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4.8 from 54 votes

Monster Cookies

These monster cookies are soft and chewy peanut butter oatmeal cookies loaded with chocolate chips and M&M's. An easy and classic cookie that's perfect for parties, after school snacks and special occasions.

Prep Time
10 mins
Cook Time
10 mins
Total Time
25 mins
Servings: 24 servings
Calories: 159 kcal
Course: Dessert , Snacks
Cuisine: American

Ingredients

  • 1/2 cup butter softened
  • 3/4 cup brown sugar
  • 1/4 cup granulated sugar
  • 1 egg
  • 1/2 cup peanut butter I prefer creamy but crunchy will also work
  • 1 teaspoon vanilla extract
  • 1 cup all purpose flour
  • 1/2 teaspoon baking soda
  • 1 1/4 cups rolled oats
  • 1 cup M&M's plus more for tops of cookies
  • 1/2 cup semisweet chocolate chips plus more for tops of cookies

Instructions

    Cup of Yum
  1. Preheat the oven to 350°F.
  2. Line a sheet pan with a piece of parchment paper or silicon baking mat.
  3. Place the butter, brown sugar, and granulated sugar in the bowl of a mixer. Beat until light and fluffy, 1-2 minutes.
  4. Add the egg, peanut butter and vanilla to the bowl and mix until combined.
  5. Add the flour and baking soda to the bowl and mix until just combined. Stir in the oats.
  6. Add the M&M's and chocolate chips to the bowl and gently fold them into the dough.
  7. Make 2 tablespoon sized balls of cookie dough and place them 2 inches apart on the prepared sheet pan. You will need to bake the cookies in batches.
  8. Press a few M&M's and chocolate chips onto the top of each cookie dough ball.
  9. Bake for 11-13 minutes or until edges are lightly browned. 
  10. Cool the cookies on the pan for 5 minutes, then transfer to a cooling rack.
  11. Repeat the process with the remaining cookie dough. Cool all cookies completely then serve.

Notes

  • Store any leftover cookies in a sealed container for up to 5 days, or you can freeze the cookies for up to 2 months.
  • Store any leftover cookies in a sealed container for up to 5 days, or you can freeze the cookies for up to 2 months.
  • Rolled oats are sometimes called old fashioned oats at the grocery store.

Nutrition Information

Calories 159kcal (8%) Carbohydrates 18g (6%) Protein 2g (4%) Fat 8g (12%) Saturated Fat 3g (15%) Cholesterol 17mg (6%) Sodium 86mg (4%) Potassium 88mg (3%) Fiber 1g (4%) Sugar 10g (20%) Vitamin A 130IU (3%) Calcium 15mg (2%) Iron 0.8mg (4%)

Nutrition Facts

Serving: 24servings

Amount Per Serving

Calories 159

% Daily Value*

Calories 159kcal 8%
Carbohydrates 18g 6%
Protein 2g 4%
Fat 8g 12%
Saturated Fat 3g 15%
Cholesterol 17mg 6%
Sodium 86mg 4%
Potassium 88mg 2%
Fiber 1g 4%
Sugar 10g 20%
Vitamin A 130IU 3%
Calcium 15mg 2%
Iron 0.8mg 4%

* Percent Daily Values are based on a 2,000 calorie diet.