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person's hand holding a giant monster cookie
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5 from 3 votes

Giant Monster Cookies

The best monster cookies are GIANT in size and full of peanut butter, oatmeal, chocolate chips, and M&M’s. Super soft, thick, easy, and delicious!
Prep Time5 minutes
Cook Time18 minutes
Total Time23 minutes
Course: Dessert
Keyword: giant monster cookies
Servings: 6 cookies

Ingredients

  • 16 oz peanut butter about 1 3/4 cup, do not use all-natural
  • 1/2 cup butter room temperature
  • 1 1/2 cups brown sugar
  • 1/2 cup granulated sugar
  • 3 eggs
  • 1 tsp vanilla
  • 4 1/2 cups old-fashioned oats gluten-free if necessary
  • 2 tsp baking soda
  • 1 cup milk chocolate chips
  • 1 cup M&M's can use mini or regular

Instructions

  • Preheat oven to 350 degrees Fahrenheit and line two cookie sheets with parchment paper.
  • In a large bowl, combine peanut butter, butter, brown sugar, and granulated sugar. Stir until smooth.
  • Add eggs and vanilla and stir until combined.
  • Add the oats and baking soda. Stir well, make sure it is very well mixed.
  • Mix in the chocolate chips and M&M’s.
  • Using a 1/2 cup dry measuring cup, portion out balls of cookie dough and roll between clean palms to make them smooth.
  • Place 3 cookies on a cookie sheet at once so they have room to spread.
  • Bake for 12 minutes then press them down slightly using a fork and bake for another 6 minutes.
  • Let cool on the tray for about 5 minutes then transfer to a cooling rack.