Monster Cookie Recipe That'll Turn Anyone Into a Cookie Monster

We love a cookie that has all the things in it, and our monster cookies are packed with all the ingredients you love most.

Updated January 29, 2024
Monster Cookie Recipe

When you can't decide between a cookie with peanut butter, oatmeal, chocolate chips, or M&Ms, we have the perfect solution. Monster cookies! This recipe has all the goodies you love in a single cookie so you don't have to choose between them.

Monster Cookie Recipe

We've loved monster cookies since we were kids, and it's easy to see why when there's so much goodness packed into each bite. 


  • ¾ cup butter, softened
  • ¾ cup peanut butter (smooth or chunky)
  • ¾ cup packed brown sugar
  • ¾ cup sugar
  • 1 teaspoon vanilla
  • 2 eggs
  • 1½ cups flour
  • 1¾ cups old-fashioned oats
  • ¼ teaspoon salt
  • ¾ teaspoon baking soda
  • ¾ teaspoon baking powder
  • 1 cup M&Ms
  • 1 cup chocolate chips


  1. Preheat the oven to 350°F. Line a baking sheet with parchment.
  2. In a large bowl, cream together the butter, peanut butter, brown sugar, and sugar.
  3. Add the vanilla and eggs and mix well.
  4. Add the flour, oats, salt, baking soda, and baking powder. Mix well.
  5. Stir in the M&Ms and chocolate chips.
  6. Scoop into 1-inch balls and put them on the cookie sheet, giving them plenty of room to spread. You'll need to bake in batches.
  7. Bake in the preheated oven until the cookies are just set and slightly browned at the edges, 10-12 minutes.

Related: Super Easy Cookie Recipes & the Sweetest Variations


With the base of these cookies, you can add all sorts of goodies. Some of our favorite variations:

  • Replace peanut butter with cashew butter or, if you have a nut allergy, any seed butter.
  • Replace the M&Ms with Reese's Pieces.
  • Replace the chocolate chips with white chocolate chips or butterscotch chips.
  • Use peanut butter chips in place of the chocolate chips.
  • Add ½ cup of toffee bits when you stir in the M&Ms and chocolate chips.
  • Use our peanut butter ganache recipe and make sandwich cookies. 

Cookies With All the Things

It's hard not to love a cookie that has all the things in it. With so much goodness in every bite, we bet these cookies will be a family favorite. 

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Monster Cookie Recipe That'll Turn Anyone Into a Cookie Monster