When it comes to pure, unadulterated indulgence, few treats can rival the sheer joy of a freshly baked batch of Soft Batch Monster Cookies! These aren’t just any cookies; we’re talking about generously thick, luxuriously chewy, and utterly irresistible peanut butter oatmeal cookies, packed to the brim with a delightful medley of mix-ins. Each bite promises a melt-in-your-mouth experience that transports you straight to cookie heaven. If you’re searching for the ultimate crowd-pleasing dessert that satisfies every sweet craving, look no further than this phenomenal recipe.
Craving more easy and delicious monster cookie creations? We have a collection of other fantastic versions you’ll adore! Dive into our Halloween Reese’s Monster Cookie Bars, explore our healthier Flourless Peanut Butter Monster Cookies, celebrate with our vibrant Patriotic Monster Cookies, or try the decadent Monster Nutella & Peanut Butter Cookies!

Why You’ll Absolutely Adore These Soft Batch Monster Cookies
There’s a special kind of magic in baking, and this recipe for soft batch monster cookies perfectly encapsulates it. It takes a beloved classic and elevates it to extraordinary heights, creating a treat that becomes an instant favorite for everyone who tries it. Here’s why these cookies will steal your heart:
- Unbeatable Soft & Chewy Texture: Imagine pulling a warm cookie straight from the oven, its edges perfectly golden and its center irresistibly soft and chewy. These monster cookies deliver that dreamy texture every single time, making them truly unforgettable. The combination of peanut butter, oats, and the perfect bake time ensures a tender bite that never disappoints.
- A Symphony of Flavors and Textures: These aren’t just plain cookies; they’re a celebration of contrasting textures and complementary flavors. Each cookie is generously loaded with creamy peanut butter, wholesome oats, rich chocolate chips, and colorful M&M’s. This medley creates a delightful sensory experience, from the satisfying chew of the oats to the melty pockets of chocolate and the slight crunch of candy-coated shells.
- Effortless to Make – No Chilling Required!: Forget the hassle of waiting around for your cookie dough to chill. This recipe is designed for immediate gratification. Using simple, readily available ingredients from your pantry, you can whip up a batch of these bakery-style cookies without any frustrating delays. This makes them perfect for spontaneous baking urges or when you need a delicious treat in a flash.
- A True Family Favorite: Throughout countless baking experiments, this monster cookie recipe has consistently stood out as a beloved family staple. It’s the kind of cookie that evokes smiles, sparks joy, and creates cherished memories, making it a go-to for any occasion, big or small.
- Perfect for Any Occasion: Whether you’re planning a bake sale, celebrating a birthday, hosting a holiday gathering, bringing a dish to a potluck, or simply enjoying a quiet evening at home, these soft batch monster cookies are the perfect solution. Their vibrant appearance and universally loved flavors make them a hit with both kids and adults, ensuring they disappear quickly wherever they’re served.
- Satisfy Every Sweet Tooth: If you have a serious sweet tooth, prepare to be completely satisfied. The rich blend of peanut butter and chocolate, combined with the comforting sweetness of the cookie base and candies, creates a deeply satisfying dessert that curbs all cravings.
Essential Ingredients for Your Soft Batch Monster Cookies
Crafting these delectable cookies begins with a handful of everyday ingredients, most of which you likely already have in your kitchen pantry. The beauty of this recipe lies in its simplicity and the way these humble components come together to create something truly extraordinary. For the best results, ensure your butter and eggs are at room temperature, as this helps them cream together more smoothly, resulting in a lighter, more consistent dough.
Soft Batch Monster Cookie Recipe Ingredients
- ½ cup unsalted butter, softened
- 1 cup creamy peanut butter (brands like Jif, Skippy, or a natural creamy variety work well)
- ⅓ cup granulated sugar
- ¾ cup brown sugar (packed)
- 2 large eggs, at room temperature
- 2 teaspoons vanilla extract
- 1 ¼ cups all-purpose flour
- 1 teaspoon baking soda
- ½ teaspoon salt
- 1 ¾ cups old fashioned oats (rolled oats for optimal texture)
- ⅔ cup semi-sweet chocolate chips (plus more for pressing on top if desired)
- 1 cup M&M’s candies (plus more for pressing on top if desired)

Step-by-Step Instructions: How to Bake Soft Batch Monster Cookies
Get ready to create cookie magic! Follow these straightforward steps to bake perfect soft batch monster cookies every time. The process is designed to be simple and enjoyable, leading to a truly impressive final product.
- Prepare Your Oven and Baking Sheets: Begin by preheating your oven to 350°F (175°C). Line several large cookie sheets with parchment paper. This prevents sticking and ensures even baking and easy cleanup.
- Cream Butter and Peanut Butter: In a large mixing bowl, using an electric mixer on medium speed, cream together the softened unsalted butter and creamy peanut butter until smooth and well combined. This step is crucial for achieving the right cookie texture.
- Add Sugars: Gradually add the granulated sugar and brown sugar to the butter-peanut butter mixture. Continue beating for about 2 minutes until the mixture becomes light, fluffy, and creamy. This aerates the butter and sugar, contributing to the cookies’ softness.
- Incorporate Eggs and Vanilla: Beat in the room temperature eggs one at a time, ensuring each is fully incorporated before adding the next. Stir in the vanilla extract until just combined. Be careful not to overmix at this stage.
- Whisk Dry Ingredients: In a separate small mixing bowl, whisk together the all-purpose flour, baking soda, and salt. This ensures these dry ingredients are evenly distributed throughout the dough.
- Combine Wet and Dry Mixtures: Gradually add the flour mixture to the peanut butter mixture, mixing on low speed until just combined. Avoid overmixing, as this can lead to tough cookies.
- Fold in Oats and Mix-Ins: With a wooden spoon or a rubber spatula, gently stir in the old fashioned oats, semi-sweet chocolate chips, and M&M’s candies until they are evenly distributed throughout the dough.
- Scoop and Shape Cookies: Using a 1/4 cup cookie scoop, drop portions of dough onto the prepared baking sheets, leaving about 3 inches between each cookie to allow for spreading. For an extra aesthetic touch, press a few additional chocolate chips and M&M’s onto the tops of each cookie dough ball before baking. No need to chill the dough for these wonderfully chewy monster cookies! If you prefer a slightly thinner cookie, you can gently press down on the dough balls with the back of a spoon.
- Bake to Perfection: Bake the cookies for 10-12 minutes. The edges should be set, but the centers may still look slightly soft or underdone. This is key for achieving that desirable soft batch effect! It’s always better to slightly underbake these cookies than to overbake them, which can result in a dry, hard texture.
- Cooling: Allow the cookies to cool on the baking sheet for 5 minutes before carefully transferring them to a wire rack to cool completely. This resting period helps them firm up and prevents them from breaking.

Tips for Monster Cookie Success
Achieving the perfect soft batch monster cookie is all about a few key techniques. By paying attention to these details, you’ll ensure a consistent, delicious result every time you bake:
- Room Temperature is Key: Ensure your butter and eggs are at room temperature. Softened butter creams beautifully with sugars, incorporating air and creating a tender crumb. Room temperature eggs emulsify better with the fat, leading to a smoother, more uniform dough.
- Measure Flour Correctly: For accurate results, spoon your flour into the measuring cup and then level it off with the back of a knife. Scooping directly from the bag can compact the flour, resulting in too much dry ingredient and potentially dry, dense cookies.
- Don’t Overmix the Dough: Once you add the dry ingredients to the wet, mix only until just combined. Overmixing develops the gluten in the flour, which can lead to tough, less tender cookies.
- The Secret to Soft Batch: As noted in the instructions, slightly underbaking these cookies is the trick to their incredible soft-batch texture. They may look a bit raw in the center when you pull them out, but they will continue to set as they cool on the hot baking sheet, leaving you with that perfect chewy interior.
- Uniform Scoop Size: Using a 1/4 cup cookie scoop (or a similar size) ensures that all your cookies are roughly the same size, promoting even baking.
- Customize Your Toppings: While the recipe suggests adding extra M&M’s and chocolate chips to the tops, don’t be afraid to get creative. A sprinkle of flaky sea salt can enhance the sweetness and cut through the richness beautifully.
Storing Your Delicious Monster Cookies
One of the many wonderful qualities of these monster cookies is how well they store, maintaining their incredible texture and flavor for days. Thanks to key ingredients like oats and peanut butter, these cookies have a natural longevity.
Oats, a common staple in monster cookie recipes, are known for their low moisture content, which contributes to a longer shelf life. When combined with creamy peanut butter, which acts as a natural preservative due to its fat content, these cookies are exceptionally good at retaining their soft, chewy texture and rich flavor.
To keep your cookies at their freshest, simply store them in an airtight container at room temperature on your countertop. Not only will they stay wonderfully fresh for up to 5 days, but they’ll also infuse your kitchen with the irresistible aroma of a gourmet bakery. For an even longer storage solution, these cookies freeze beautifully. Once completely cooled, place them in a single layer in an airtight freezer-safe container or freezer bag for up to 2-3 months. Thaw at room temperature for a quick, delicious treat anytime.
Who knows, these delightfully soft and chewy cookies might just become a cherished tradition in your home, just as they have in mine!
Creative Variations & Customizations for Your Monster Cookies
One of the best things about monster cookies is their incredible versatility. This recipe is a fantastic starting point, but don’t hesitate to make it your own by experimenting with different mix-ins and substitutions. Here are some ideas to spark your creativity and tailor these treats to your liking:
- Explore New Mix-Ins: Beyond classic M&M’s and chocolate chips, the possibilities are endless! Consider adding raisins, dried cranberries, chopped pretzels for a salty crunch, toffee bits, white chocolate chips, butterscotch chips, or various nuts like pecans, walnuts, or peanuts. For an extra peanut butter punch, try mini Reese’s Pieces or peanut M&M’s.
- Nut Butter Alternatives: While creamy peanut butter is traditional, feel free to switch it up! Almond butter, cashew butter, or even sunflower seed butter (for nut-free options) can be used. Just ensure you choose a creamy, not chunky, variety to maintain the dough’s smooth consistency and the cookie’s tender texture.
- Chocolate Chip Extravaganza: Don’t limit yourself to semi-sweet chocolate chips. Experiment with milk chocolate chips, dark chocolate chunks, white chocolate chips, or even a blend of different types to create unique flavor profiles in every bite.
- Oat Options: We love the hearty texture that old fashioned rolled oats provide, but you can certainly use quick oats for a slightly finer texture. A combination of both can also offer an interesting chew. Ensure you’re not using instant oats, as they can absorb too much moisture and alter the cookie’s texture.
- Adjusting for Salted Butter: If you only have salted butter on hand, simply reduce the amount of added salt in the recipe to 1/4 teaspoon. This small adjustment will balance the flavors perfectly.
- Spice It Up: A pinch of cinnamon or a dash of nutmeg can add a warm, cozy dimension to your monster cookies, especially during the fall and winter months.
- Mini Monster Cookies: For smaller treats, use a smaller cookie scoop (e.g., 1-tablespoon size) and reduce the baking time slightly to 8-10 minutes. These are perfect for parties or lunchboxes.

Frequently Asked Questions About Soft Batch Monster Cookies
Have some questions before you start baking? Here are answers to common queries about making these delicious monster cookies:
- Can I make these cookies gluten-free?
Yes! To make them gluten-free, substitute the all-purpose flour with a 1:1 gluten-free baking flour blend that contains xanthan gum. Ensure your oats are certified gluten-free, as oats can sometimes be cross-contaminated during processing. - What kind of peanut butter works best?
Creamy peanut butter is ideal for this recipe. While natural peanut butter can be used, ensure it’s well-stirred and creamy, not overly oily or crumbly, as this can affect the dough consistency. Avoid chunky peanut butter unless you prefer extra large peanut chunks in your cookies. - My cookies spread too much, what went wrong?
Several factors can cause excessive spreading. Ensure your butter wasn’t too soft (over-softened butter can make cookies spread). Also, accurately measure your flour; too little flour can lead to flat cookies. Sometimes, the type of peanut butter can also play a role; very oily natural peanut butter might contribute to more spread. - Can I halve or double the recipe?
Yes, this recipe is easily scalable. You can halve all the ingredients for a smaller batch or double them for a larger crowd. When doubling, it’s often easiest to mix in two separate large bowls if your mixer isn’t extra-large. - How do I know when the cookies are done?
The key to soft batch cookies is to pull them from the oven when the edges are lightly golden and set, but the centers still look slightly soft, puffy, and even a little underbaked. They will continue to cook and set on the hot baking sheet as they cool, achieving that perfect chewy interior. - Can I use quick oats instead of old fashioned oats?
Yes, you can substitute quick oats for old fashioned oats. The texture will be slightly less chewy and more uniform. If you prefer the hearty chew, stick to old fashioned rolled oats.
In conclusion, these soft batch monster cookies are far more than just a delicious treat; they are an experience! From the delightful chewiness to the explosion of flavors from gooey chocolate chips, hearty oats, and crunchy M&M’s, each bite is a joyous reminder to embrace life’s simple pleasures. They truly embody indulgence and will undoubtedly bring a radiant smile to your face!
This monster cookie recipe is incredibly easy to master, and the reward is a batch of thick, 1/4 cup-sized soft batch delights that are simply irresistible. Get ready to bake, enjoy, and share!
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Soft Batch Monster Cookies Recipe Card
Author: Kim Lange
Indulge in the ultimate sweet treat: soft batch monster cookies. This chewy, loaded peanut butter oat cookie recipe is impossible to resist!
Prep Time: 10 minutes
Cook Time: 10-12 minutes
Course: Dessert
Servings: 18 Cookies
Keywords: chocolate chips, cookies, M&Ms, monster cookies, oats, peanut butter
Ingredients
- ½ cup unsalted butter, softened
- 1 cup creamy peanut butter
- ⅓ cup granulated sugar
- ¾ cup brown sugar
- 2 large eggs, room temperature
- 2 teaspoons vanilla extract
- 1 ¼ cups all-purpose flour
- 1 teaspoon baking soda
- ½ teaspoon salt
- 1 ¾ cups old fashioned oats
- ⅔ cup semi-sweet chocolate chips, (more for tops if desired)
- 1 cup M&M’s, (more for tops if desired)
Instructions
- Preheat oven to 350°F (175°C). Line cookie sheets with parchment paper.
- In a large bowl, using a mixer, cream butter and peanut butter. Add the sugars and beat together until light and creamy for about 2 minutes.
- Mix in the eggs and vanilla extract until just combined.
- In a separate small mixing bowl, whisk the flour, baking soda, and salt together.
- Add the flour mixture to the peanut butter mixture, then add in the oats. Mix until combined.
- Stir in the chocolate chips and M&M’s by hand with a wooden spoon or rubber spatula.
- Use a 1/4 cup cookie scoop, scoop portions onto a baking sheet, leaving 3 inches between each. Press some M&M’s & chocolate chips into the tops of each of the cookies. No need to chill for chewy monster cookies! You can press the cookie dough balls down if you prefer less thick cookies.
- Bake for 10-12 minutes and remove from oven. Cookies may not look fully set in the center, but it’s better to have them slightly under-baked versus over-baked for the soft batch cookie effect!
- Let cookies cool for 5 minutes on the pan, then move them to a cooling rack to cool completely.
Notes & Variations:
- Mix-in ideas: Add raisins, dried cranberries, peanut M&M’s, mini M&M’s, Reese’s Pieces, pecans, walnuts, or any type of nuts.
- Nut butter options: Switch out peanut butter for almond butter, cashew butter, or another creamy nut butter.
- Chocolate chip varieties: Use peanut butter chips, white chocolate chips, butterscotch chips, or milk chocolate chips.
- Oat types: Rolled oats are preferred for texture, but quick oats can also be used, or a combination.
- Salt adjustment: If using salted butter, reduce the added salt to 1/4 teaspoon.
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