5 from 7 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: Cookie, Cookies, 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 8 to 10 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*
Total Fat 14g 22%
Saturated Fat 7g 35%
Cholesterol 31mg 10%
Sodium 166mg 7%
Potassium 121mg 3%
Total Carbohydrates 28g 9%
Dietary Fiber 1g 4%
Sugars 16g
Protein 4g 8%
Vitamin A 4.3%
Vitamin C 0.1%
Calcium 2.8%
Iron 7.1%
* Percent Daily Values are based on a 2000 calorie diet.