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Easy Monster Cookies Recipe

Published: Feb 9, 2025 by Emily Johnson · This post may contain affiliate links · 1 Comment

Imagine this: You're about to discover your new favorite cookie recipe! Hi there, fellow baking enthusiast! I'm so excited to share this magical Monster Cookies Recipe with you - it's one of those recipes that just makes your whole house smell like happiness and childhood memories.


Let me tell you why this Monster Cookies Recipe has become such a treasured favorite in so many kitchens. First off, it's like the "greatest hits" of cookies - imagine if all your favorite cookie ingredients got together and threw a party! The peanut butter brings its rich, nutty goodness, the M&Ms add pops of chocolate joy and fun colors, and the oats? They're here to give these cookies that amazing chewy texture that'll keep you coming back for "just one more."

Monster Cookies Recipe – A deliciously soft and chewy cookie packed with colorful M&Ms and gooey chocolate chips, freshly baked to perfection. The ultimate treat for cookie lovers!
Thick, chewy monster cookies recipe packed with peanut butter, oats, chocolate chips, and colorful M&Ms! These oversized treats are crispy on the edges, soft in the middle, and ready in just 30 minutes.
Jump to Recipe Print Recipe
Monster Cookies Recipe – A soft and chewy cookie bursting with colorful M&Ms and melted chocolate chips, fresh from the oven. The perfect sweet treat for chocolate lovers!

Why You'll Love This Monster Cookies Recipe

You know how sometimes you just can't decide which type of cookie to make? Well, guess what - this Monster Cookies Recipe is here to solve that delicious dilemma! Think of them as the ultimate "everything but the kitchen sink" cookies, but in the most amazing way possible. They're like having all your cookie dreams wrapped up in one perfectly chewy, totally irresistible package!

Want to know what makes this Monster Cookies Recipe so special? Picture this: they've got the hearty, comforting chewiness of your favorite oatmeal cookies (you know, the ones that make you feel like you're getting a warm hug from grandma), combined with that rich, creamy peanut butter goodness that just makes everything better. And then - because we believe in cookie magic - we throw in a party of colorful M&Ms that make every bite a delightful surprise!

These aren't just called Monster Cookies Recipe because they're big (though trust me, they're gloriously large!) - they're monster-sized in flavor and fun too! They're those cookies that make everyone's eyes light up at bake sales, the ones that disappear first at potlucks, and the absolute stars of any lunch box. Just imagine the smile on your kids' faces when they open their lunch to find one of these beauties!

Jump to:
  • Why You'll Love This Monster Cookies Recipe
  • Ingredients
  • Monster Cookies Recipe Instructions
  • Storage Instructions
  • Recipe Variations
  • Equipment For Monster Cookies Recipe
  • Top Tip
  • Grandma's Magic Touch
  • FAQ
  • How did your Monster Cookies Recipe turn out?
  • Related
  • Pairing
  • Easy Monster Cookies Recipe

Ingredients

Let's gather up all the goodies we need to make these amazing Monster Cookies Recipe! I'm so excited to share this ingredient list with you - it's like a treasure map to cookie perfection!

  • 3 large eggs, room temperature
  • 1¼ cups light brown sugar, packed
  • 1 cup granulated sugar
  • 1 tablespoon vanilla extract
  • 2 cups creamy peanut butter (not natural-style)
  • ½ cup unsalted butter, softened
  • 4½ cups old-fashioned rolled oats
  • 1 cup all-purpose flour
  • 2 teaspoons baking soda
  • ½ teaspoon salt
  • 1 cup semi-sweet chocolate chips
  • 1 cup M&Ms
  • ½ cup mini M&Ms (for topping)
Monster Cookies Recipe – A beautifully arranged set of ingredients including peanut butter, oats, chocolate chips, M&Ms, vanilla extract, eggs, and flour, ready to create a batch of chewy and colorful monster cookies.

Monster Cookies Recipe Instructions

Let's walk through this Monster Cookies Recipe together - I'll be your kitchen buddy every step of the way!

Getting Your Baking Station Ready:

First things first, let's set ourselves up for success!

  1. Crank up that oven to 350°F (175°C) - time to get the kitchen warming up with cookie-baking vibes!
  2. Grab your favorite baking sheets and line them with parchment paper or silicone mats (either works great!)
  3. Pro tip: Let's make sure all our ingredients are at room temp - it makes such a difference in the final product!

Time for the Wet Ingredients (The Fun Part!):

  1. In your biggest mixing bowl, let's start our cookie adventure! Toss in those eggs and both sugars - they're about to become best friends
  2. Get your mixer ready and beat everything for about 2 minutes - watch the magic happen as it gets lighter and fluffier!
  3. Now for the stars of the show - in goes the vanilla, peanut butter, and butter. Mix until everything's smooth and creamy (and try not to sneak too many tastes! 😉)
Monster Cookies Recipe – Mixing creamy peanut butter, butter, sugar, and vanilla extract to create a rich and smooth cookie dough base for deliciously chewy monster cookies.

Adding the Dry Team:

  1. In a separate bowl, let's get all our dry ingredients partying together - whisk those oats, flour, baking soda, and salt
  2. Now, gradually add this mixture to your wet ingredients - remember, slow and steady wins the race!
  3. Here's a secret: stop mixing as soon as everything comes together. We want tender cookies, not tough ones!
Monster Cookies Recipe – Whisking together oats, flour, baking soda, and salt to create the perfect dry ingredient mix for soft and chewy monster cookies.

The Mix-in Magic:

  1. Now for everyone's favorite part - fold in those chocolate chips and M&Ms! Use a spatula and show them some love
  2. Keep those mini M&Ms nearby - they're going to be our pretty toppers!

The Grand Finale:

  1. Time to scoop! Use your 3-tablespoon scoop to drop these beauties onto your prepared sheets
  2. Give them some personal space (about 3 inches) - nobody likes crowded cookies!
  3. Top each one with some mini M&Ms - make them look extra fancy!
  4. Into the oven they go for 12-14 minutes. The edges should be getting golden, but the centers should still look a little soft (they'll finish setting up as they cool)

The Cool-Down:

  1. Let them hang out on the baking sheet for 5 minutes (I know it's hard to wait!)
  2. Move them to a wire rack to cool completely
  3. Store them in an airtight container (if they last that long!)

Storage Instructions

  • Counter: Store in an airtight container for up to 5 days
  • Freezer: Baked cookies can be frozen for up to 3 months
  • Cookie Dough: Can be frozen in balls for up to 3 months - add 1-2 minutes to baking time when baking from frozen

Recipe Variations

  • Make them gluten-free by using certified gluten-free oats and replacing the all-purpose flour with a 1:1 gluten-free flour blend
  • Swap M&Ms for Reese's Pieces for an extra peanut butter punch
  • Add ½ cup chopped peanuts for extra crunch
  • Use dark chocolate chips instead of semi-sweet for a richer chocolate flavor

Equipment For Monster Cookies Recipe

  • Large mixing bowl
  • Electric mixer (stand mixer preferred, but hand mixer works too)
  • Measuring cups and spoons
  • Cookie sheets
  • Parchment paper or silicone baking mats
  • Cookie scoop (3-tablespoon size recommended)
  • Cooling rack

Top Tip

Don't substitute quick oats for old-fashioned oats - the texture won't be the same

Use room temperature ingredients for better incorporation and even baking

Don't overbake! The cookies will continue to set as they cool

For perfectly round cookies, use a large round cookie cutter to gently shape them while still warm

Grandma's Magic Touch

You know those special recipes that bring back warm memories of childhood? This Monster Cookies Recipe is exactly that - inspired by my grandmother's time-tested baking wisdom. She always said the secret wasn't just in the ingredients, but in the love and patience you put into each batch. Her special touch? Adding an extra handful of M&Ms "for good luck" and letting the dough rest for 15 minutes before baking, which she swore made the cookies extra chewy. While modern kitchens might have fancier gadgets than Grandma's old wooden spoon and mixing bowl, her techniques still make these monster cookies irresistibly delicious.

There's nothing quite like biting into a warm, chewy monster cookie packed with colorful M&Ms, creamy peanut butter, and hearty oats. This monster cookies recipe creates perfectly thick, soft-centered cookies that are guaranteed to disappear quickly! Whether you're baking for a bake sale, holiday cookie exchange, or just craving a delicious homemade treat, these monster cookies deliver big on both size and flavor.

FAQ

What is the secret to chewy monster cookies?

The secret to perfectly chewy monster cookies lies in three key ingredients: brown sugar, peanut butter, and old-fashioned oats. Brown sugar contains molasses which retains moisture, while peanut butter adds richness and chewiness. Additionally, slightly underbaking the cookies (removing them when centers are still soft) ensures they stay chewy after cooling.

How do you make box cookies more chewy?

While this monster cookies recipe is made from scratch, you can make any cookie chewier by replacing white sugar with brown sugar, adding an extra egg yolk, and slightly reducing the baking time by 1-2 minutes. For monster cookies specifically, the combination of peanut butter and oats naturally creates an irresistibly chewy texture.

What makes cookies chewy instead of crispy?

Monster cookies stay chewy thanks to their moisture-retaining ingredients. The high ratio of brown sugar to white sugar, along with peanut butter and eggs, creates a higher moisture content. Additionally, using old-fashioned oats rather than quick oats helps maintain chewiness by absorbing moisture slowly and creating a sturdy structure.

Can I make smaller monster cookies?

Yes! Use a smaller cookie scoop and reduce baking time by 2-3 minutes. Keep in mind that traditional monster cookies are known for their large size.

How did your Monster Cookies Recipe turn out?

This recipe is sure to impress with its perfect combination of chewy oats, creamy peanut butter, and colorful M&Ms in every bite. If you're a fan of crowd-pleasing cookies that pack a flavor punch, be sure to try our Lemon Cookies Recipe next - another easy-to-make yet delicious treat!

Did you make this Monster Cookies Recipe? We'd love to hear about your experience! Leave a star rating and share your thoughts in the comments.

Did you try any creative twists or use any unique ingredients? Your feedback not only helps others but also contributes to our growing community of home cooks. Don't forget to share a photo of your culinary creation!

Related

Looking for other recipes like this? Try these:

  • Slices of vanilla Swiss Champagne Cake Roll filled with whipped cream and dusted with powdered sugar, served with fresh strawberries and mint garnish.
    Easy Champagne Cake Roll Recipe
  • Freshly baked artisan sourdough bread loaf sliced on a wooden cutting board with a golden crust and airy crumb texture.
    Beginner Sourdough Bread Recipe
  • Slice of creamy Orange Pie topped with whipped cream and a fresh orange slice on a white plate with whole pie blurred in the background.
    The Best Orange Pie Recipe
  • No-Bake Greek Yogurt Fruit Tart slice with berries and kiwi.
    No-Bake Greek Yogurt Fruit Tart

Pairing

These are my favorite dishes to serve with Monster Cookies Recipe

  • A rustic mixed Berry Galette with a golden, flaky crust, filled with blueberries, raspberries, and blackberries, topped with scoops of vanilla ice cream and a metal spatula lifting a slice.
    The Best Berry Galette Recipe
  • Baked Lemon Pudding Cakes in a ramekin with lemon slice and blueberries, spoon scooping.
    Easy Lemon Pudding Cakes Recipe
  • Stack of freshly baked Chocolate Snickerdoodles cookies with sugar coating, one cookie partially bitten on top.
    Easy Chocolate Snickerdoodles Recipe
  • Golden baked Sweet Potato Rolls with cinnamon butter.
    Sweet Potato Rolls Recipe
Monster Cookies Recipe - A soft and chewy cookie bursting with colorful M&Ms and melted chocolate chips, fresh from the oven. The perfect sweet treat for chocolate lovers!

Easy Monster Cookies Recipe

5 from 1 vote
Thick, chewy monster cookies recipe packed with peanut butter, oats, chocolate chips, and colorful M&Ms! These oversized treats are crispy on the edges, soft in the middle, and ready in just 30 minutes.
Print Recipe Pin Recipe
Prep Time 15 minutes mins
Cook Time 12 minutes mins
Total Time 27 minutes mins
Servings: 24 large cookies
Course: Dessert
Cuisine: American
Calories: 375
Ingredients Equipment Method Nutrition Notes

Ingredients
  

Wet Ingredients
  • 3 large eggs room temperature
  • 1¼ cups light brown sugar packed
  • 1 cup granulated sugar
  • 1 tablespoon vanilla extract
  • 2 cups creamy peanut butter
  • ½ cup unsalted butter softened
Dry Ingredients
  • 4½ cups old-fashioned rolled oats
  • 1 cup all-purpose flour
  • 2 teaspoons baking soda
  • ½ teaspoon salt
Mix-ins
  • 1 cup semi-sweet chocolate chips
  • 1 cup M&Ms
  • ½ cup mini M&Ms for topping

Equipment

  • Large mixing bowl
  • Electric mixer (stand mixer preferred, but hand mixer works too)
  • Measuring cups and spoons
  • Cookie sheets
  • Parchment paper or silicone baking mats
  • Cookie scoop (3-tablespoon size recommended)
  • Cooling rack

Method
 

  1. Preheat oven to 350°F (175°C). Line baking sheets with parchment paper.
  2. Beat eggs, brown sugar, and white sugar until well combined (2 mins).
  3. Add vanilla, peanut butter, and butter. Mix until creamy.
    Monster Cookies Recipe - Creamy peanut butter mixture whipped to perfection, forming the rich and flavorful base for delicious, chewy monster cookies.
  4. Whisk together oats, flour, baking soda, and salt.
  5. Gradually mix dry ingredients into wet mixture.
  6. Fold in chocolate chips and regular M&Ms.
  7. Scoop 3-tablespoon portions onto baking sheets.
    Monster Cookies Recipe - Scooping perfectly portioned cookie dough with chocolate chips onto a parchment-lined baking sheet, ready to bake into chewy, delicious treats.
  8. Top with mini M&Ms.
  9. Bake 12-14 minutes until edges are lightly golden.
  10. Cool 5 minutes on sheet, then transfer to rack.

Nutrition

Calories: 375kcalCarbohydrates: 46gProtein: 9gFat: 19gSaturated Fat: 7gTrans Fat: -1gCholesterol: 31mgSodium: 235mgFiber: 2.5gSugar: 32g

Notes

  • Don't overbake - centers should look slightly underdone
  • Use room temperature ingredients
  • Chill dough if too soft
  • Store in airtight container up to 5 days
  • Freezer-friendly up to 3 months

Tried this recipe?

Let us know how it was!

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Comments

  1. Brittany Anderson says

    March 27, 2026 at 6:49 pm

    5 stars
    The ultimate monster cookies! These are packed with so many delicious mix-ins and the texture is perfect - crispy on the edges and chewy in the middle. Absolutely addictive!

    Reply
5 from 1 vote

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emily seo and founder of bake and savor

Hi bakers!

I'm Emily, the baker and creator behind Bake and Savor. I transform classic recipes into foolproof treats that bring joy to every kitchen. From my family's treasured recipes to modern favorites, I'm here to share the sweet science of baking with you! 🧁

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