Ultimate Peanut Butter Cup Monster Cookies

This easy Monster Cookies recipe is packed with all of my favorite things! Made with chocolate chunks, Reese’s Pieces and mini peanut butter cups, it doesn’t get much better than these cookies!

The Ultimate Monster Cookies Recipe

I am so excited for you to try these Ultimate Monster Peanut Butter Cup Cookies! You are going to love the crispy edges and soft sweet center. I played around with browning just one stick of butter and keeping the other stick softened. Love how they turned out! Hope you enjoy!

Why You’ll Love This Recipe

  • These cookies are packed with all of the good stuff!
  • You have brown butter, Reese’s Pieces, mini Peanut Butter Cups and chocolate chunks.
  • They make the perfect cookie exchange cookie and they’re great for bake sales too!

Try my Best Brown Butter Cookies too! Follow Picky Palate on Instagram for daily recipe inspiration.

What Are Monster Cookies?

Monster cookies are basically peanut butter, oatmeal, chocolate chip and M&M cookies. Kind of a version of your “kitchen sink” cookies. Keep in mind you can make monster cookies lots of different variations…like the version I’ve done today. You’re going to love it!

ingredients for monster cookies

What You’ll Need

Here are the ingredients you’ll need to make these delicious cookies. See the recipe card located at the bottom of the post for full instructions.

  • butter– I use salted butter for most of my cooking and baking recipes. Unsalted will be just fine here too.
  • dark brown sugar– When shopping for brown sugar, you’ll see light and dark brown sugar available. I like the richness of the dark brown sugar for this cookie.
  • granulated sugar– Granulated sugar is a fine sugar commonly used in cookies and other baked goods. It sweetens the cookies along with the brown sugar.
  • eggs– For consistency, I always use large eggs for my baking.
  • pure vanilla extract- Use pure vanilla extract for best tasting results.
  • all-purpose flour– All purpose flour is the main dry ingredient for this cookie recipe.
  • baking soda– Baking soda helps rise the cookies.
  • salt– I use kosher salt for my cooking and baking recipes.
  • chocolate chunks– Look for chocolate chunks in the baking isle of the grocery store. You can always chop your own chocolate from chocolate bars too.
  • Reese’s Pieces– Find Reese’s Pieces in the candy isle of the grocery store.
  • Mini Peanut Butter Cups– I get my mini peanut butter cups at Trader Joes. If you can’t find them, you can chop up your own regular size Reese’s Peanut Butter cups.
ingredients for monster cookies

How To Make Monster Cookies

Preheat oven to 375 degrees F. and line baking sheet with parchment paper.

Brown The Butter. Place one of the sticks of butter in a small saucepan over medium heat to melt. Swirl and cook until bubbly and turns deep golden brown. Takes close to 10 minutes, but watch carefully swirling pan often to check color. Once butter has burned brown, pour into a heat proof bowl, scraping brown bits from pan into the bowl. Let cool for 15 minutes.

Cream Butter and Sugars. Place brown butter and regular stick of softened butter into a large mixing bowl or stand mixer. Add brown sugar and granulated sugar mixing until well combined.  

Wet Ingredients Then Dry Ingredients. Add eggs and vanilla, mixing until well combined. Add flour, baking soda and salt stirring until dough forms then add chocolate chunks, Reese’s Pieces and mini peanut butter cups.

Place Cookie Dough Onto Baking Sheet. Scoop dough onto baking sheet…you can do large 1/4 cup dough size balls onto the baking sheet or regular size scooped dough. If making the large cookies, place dough 2 inches apart from each other. If making regular size scooped cookie dough pieces, place 1 inch apart.

scoops of monster cookies on baking sheet

Bake. For the large cookies, bake for 12-13 minutes. For regular size cookies bake for 10-12 minutes. Remove from oven and let cool before transferring.

Can I Use Different Candy in Monster Cookies?

Yes! You can use M&M’s in place of the Reese’s Pieces if you’d like and if you want to substitute the Mini Peanut Butter Cups, you can try other chopped candy bars of your choice. Snickers, Twix, Payday Candy Bars are a few good choices.

Where Can I Buy Mini Peanut Butter Cups?

I find mine at Trader Joe’s, they come in a package located above the frozen food section. You’ll see other chocolate selections near them. I’ve also spotted a bag at Target in the baking section that comes with the Mini Peanut Butter Cups and Reese’s Pieces in one bag. Check their baking isle for it.

baked monster cookies

These cookies bake so nicely. If you want to see some peanut butter cups and Reese’s Pieces on top of the cookies, at about 8 minutes of baking top partially baked cookies with some peanut butter cups and Reese’s Pieces. I’ve done it without this method and they turn out lovely as well, just not as many pieces on top. Either way, you’re winning 🙂

How Do I Brown Butter Correctly?

I’ve got a step by step photos and instructions on my blog post How To Brown Butter. Make sure to read that for helpful tips!

Do I Have To Brown the Butter?

Technically no, but if you want the cookies to look and taste like the ones I’ve posted here, I highly recommend it 🙂

baked monster cookies

How To Serve

Serve cookies at any occasion where cookies are needed. Serve room temperature. These are great as a cookie ice cream sandwich too. Scoop vanilla ice cream in between two cookies.

How To Store Extra Cookies?

Store any remaining cookies in a large Ziplock bag or airtight container for about 3 days at the most for best results.

Can I Freeze The Cookie Dough And Bake Later?

Yes, prepare the dough, roll into balls and store in either a large Ziplock bag or an airtight container and freeze until ready to bake, up to 3 months. Bring close to room temperature before baking.

Try More Cookie Recipes!

monster cookies

Ultimate Peanut Butter Cup Monster Cookies

These Ultimate Peanut Butter Cup Monster Cookies are perfect for parties, after school treats….and anytime cookie making! They bake up perfect every time!
Course: Dessert
Cuisine: American
Prep Time 15 minutes
Cook Time 12 minutes
Total Time 27 minutes
Servings: 24 cookies
Calories: 267kcal
Author: Jenny
Cost: $10
Print Pin Rate

Equipment

  • Oven
  • cookie sheet
  • mixing bowl
  • measuring cups
  • measuring spoons
  • mixing spoon
  • cookie scoop

Ingredients

  • 2 sticks butter divided (one stick will be browned)
  • 1 cup packed dark brown sugar
  • 1/2 cup granulated sugar
  • 2 large eggs
  • 1 tablespoon pure vanilla extract
  • 2 cups all-purpose flour
  • 1 teaspoon baking soda
  • 1 teaspoon kosher salt
  • 1 cup chocolate chunks I use the Trader Joe’s chocolate block and chop myself
  • 1 cup Reese’s Pieces
  • 1 1/2 cup Mini Peanut Butter Cups found at Trader Joe’s

Instructions

  • Preheat oven to 375 degrees F. and line baking sheet with parchment paper.
  • Place one of the sticks of butter in a small saucepan over medium heat to melt. Swirl and cook until bubbly and turns deep golden brown. Takes close to 10 minutes, but watch carefully swirling pan often to check color. Once butter has burned brown, pour into a heat proof bowl, scraping brown bits from pan into the bowl. Let cool for 15 minutes.
  • Place brown butter and regular stick of softened butter into a large mixing bowl or stand mixer. Add brown sugar and granulated sugar mixing until well combined. Add eggs and vanilla mixing until well combined. Add flour, baking soda and salt stirring until dough forms then add chocolate chunks, Reese’s Pieces and mini peanut butter cups. Scoop dough onto baking sheet…you can do large 1/4 cup dough size balls onto the baking sheet or regular size scooped dough. If making the large cookies, place dough 2 inches apart from each other. If making regular size scooped cookie dough pieces, place 1 inch apart. For the large cookies, bake for 12-13 minutes. For regular size cookies bake for 10-12 minutes. Remove from oven and let cool before transferring.

Nutrition

Calories: 267kcal | Carbohydrates: 39g | Protein: 5g | Fat: 11g | Saturated Fat: 5g | Cholesterol: 15mg | Sodium: 230mg | Potassium: 157mg | Fiber: 2g | Sugar: 28g | Vitamin A: 33IU | Vitamin C: 1mg | Calcium: 35mg | Iron: 1mg
Keywords: best monster cookies recipe, monster cookies

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photo collage of monster cookies

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3 Responses
  1. Sabrina

    We made this recipe this afternoon. The cookies are amazing!! Definitely a new family favorite. Thanks for sharing it!!

  2. Laurel

    You mention oatmeal at the beginning of your post (which piqued my interest) when you answer, “What’s in Monster cookies?” But don’t list this as an ingredient. Unsure if you forgot to add that in your recipe notes, or if there isn’t oatmeal at all in this recipe. Please note. Thank you. I’m a novice to baking and I’d love oatmeal in this cookie recipe, but no clue how much to add if that’s an ingredient in this particular recipe. ☺️

    1. Jenny

      Hi Laurel! I was describing a “typical” Monster Cookie, and yes they usually have oatmeal. My recipe does not. If you’d like to add some, add 1/2 cup, I think that would work out just fine 🙂

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