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Monster Cookies Recipe

5 Stars 4 Stars 3 Stars 2 Stars 1 Star 3.8 from 67 reviews
  • Author: Emma
  • Prep Time: 15 minutes
  • Cook Time: 12 minutes
  • Total Time: 27 minutes
  • Yield: 24 cookies
  • Category: Dessert
  • Method: Baking
  • Cuisine: American
  • Diet: Vegetarian

Description

Deliciously chewy Monster Cookies packed with creamy peanut butter, oats, chocolate chips, and colorful M&M’s, perfect for satisfying your sweet tooth with a delightful mix of textures and flavors.


Ingredients

Scale

Wet Ingredients

  • 1 cup creamy peanut butter
  • 1/2 cup unsalted butter (softened)
  • 2 large eggs
  • 1 teaspoon vanilla extract

Dry Ingredients

  • 1 cup brown sugar (packed)
  • 1/2 cup granulated sugar
  • 1 1/2 teaspoons baking soda
  • 1/2 teaspoon salt
  • 2 cups old-fashioned oats
  • 1 cup all-purpose flour

Add-ins

  • 3/4 cup chocolate chips
  • 3/4 cup M&M’s
  • 1/2 cup mini chocolate chips (optional)


Instructions

  1. Preheat and Prepare: Preheat your oven to 350°F (175°C) and line baking sheets with parchment paper to prevent sticking and ensure even baking.
  2. Cream Butter and Sugars: In a large bowl, beat together the peanut butter, softened butter, brown sugar, and granulated sugar until the mixture becomes smooth and creamy, which helps create a soft texture.
  3. Add Eggs and Vanilla: Incorporate the eggs and vanilla extract into the creamed mixture and mix until fully combined to add moisture and flavor.
  4. Mix Dry Ingredients: Stir in baking soda and salt evenly to help the cookies rise and balance the flavors.
  5. Add Oats and Flour: Gradually add the old-fashioned oats and all-purpose flour into the wet mixture, mixing until fully incorporated to build the cookie structure.
  6. Fold in Chocolate and M&M’s: Gently fold in the chocolate chips, M&M’s, and mini chocolate chips if using for bursts of chocolate and color throughout.
  7. Portion and Bake: Scoop the dough into 2-tablespoon portions and place them on the prepared baking sheets, spacing about 2 inches apart to allow spread during baking.
  8. Bake Cookies: Bake for 10–12 minutes until the edges are lightly golden and centers look just set, resulting in chewy cookies with a slight crisp edge.
  9. Cool: Let the cookies cool on the baking sheet for 5 minutes before transferring to a wire rack to cool completely and prevent breaking.

Notes

  • Customize your cookies by adding chopped nuts, butterscotch chips, or peanut butter chips to suit your taste.
  • To maintain soft cookies, slightly underbake them and store in an airtight container to retain moisture.