Monster Cookies
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5 from 1 vote

Mama's Monster Cookies

This Monster Cookie recipe has been handed down many generations in my family. It was a favorite in my childhood during the Holidays and now a favorite of my own children as well.  This cookie is easy to make and delicious to eat and makes a large batch so you will have plenty to share.
Prep Time10 mins
Cook Time11 mins
Total Time21 mins
Course: Dessert
Cuisine: American
Servings: 44 Cookies
Calories: 193kcal


  • 1 cup brown sugar dark
  • 1 cup granulated sugar
  • 2 tsp baking soda
  • 4 1/2 cups oatmeal
  • 1/2 cup unsalted butter melted
  • 1 cup peanut butter
  • 1/4 tsp vanilla
  • 3 eggs
  • 11.5 oz bag chocolate chips
  • 11 oz bag M&M's


  • Preheat oven to 350°
  • Combine melted butter, peanut butter, vanilla, and eggs in mixing bowl and beat until creamy. I use my Kitchenaid Mixer.
  • Combine oatmeal, brown sugar, granulated sugar, and baking soda in large bowl
  • Mix on low.
  • Slowly add dry mixture to mixing bowl and stir on low.
  • Adding a little at a time, mix in chocolate chips.
  • Mix in M&M's.
  • Scoop cookie mixture onto ungreased cookie sheets. I use a cookie scoop to get the same size cookies.
  • Bake for 11 to 13 minutes, let cool.



Let cookies cool completely and store in air tight container.


Serving: 1g | Calories: 193kcal | Carbohydrates: 24.1g | Protein: 3.9g | Fat: 9.6g | Saturated Fat: 4.6g | Cholesterol: 19mg | Sodium: 115mg | Potassium: 3.9mg | Fiber: 1.7g | Sugar: 16.7g | Calcium: 2% | Iron: 7%