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5 from 11 votes
Best Monster Cookies
Monster Cookies
Prep Time
20 mins
Cook Time
8 mins
Total Time
28 mins
The ultimate after-school snack: Monster Cookies! Soft & tender, with peanut butter, oatmeal, chocolate chips, and m&m's.
Course: Dessert
Cuisine: American
Keyword: how to make monster cookies, monster cookie recipe, Monster Cookies
Servings: 24 cookies
Calories: 259 kcal
  1. Preheat the oven to 375 degrees F, and line baking sheets with parchment paper.
  2. In a large bowl with an electric mixer, cream the butter, peanut butter, brown sugar, and granulated sugar together until pale and fluffy (3 to 5 minutes on medium-high speed).
  3. Stir in the egg, egg yolk, and vanilla until well-blended (about 1 minute on medium speed).
  4. Add the flour, oats, cornstarch, baking soda, and salt, and mix in until incorporated (about 30 seconds to a minute on low speed).
  5. Stir in the chocolate chips and m&m's, and scoop 1.5-tablespoon balls onto the prepared baking sheets.
  6. Bake for 6 to 9 minutes, or until set around the edges, slightly golden on the bottoms, and still soft in the centers.

Recipe Video

Recipe Notes

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Nutrition Facts
Monster Cookies
Amount Per Serving (1 cookie)
Calories 259 Calories from Fat 126
% Daily Value*
Fat 14g22%
Saturated Fat 7g44%
Cholesterol 31mg10%
Sodium 166mg7%
Potassium 121mg3%
Carbohydrates 28g9%
Fiber 1g4%
Sugar 16g18%
Protein 4g8%
Vitamin A 215IU4%
Vitamin C 0.1mg0%
Calcium 28mg3%
Iron 1.3mg7%
* Percent Daily Values are based on a 2000 calorie diet.