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+ servings
monster cookies stacked on a black plate.
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5 from 1 vote

Soft and Chewy Monster Cookies

Soft and chewy monster cookies are loaded with oats, peanut butter, chocolate chips, and m&m's. These cookies are so fun to make and will disappear quickly so make a double batch!
Prep Time10 mins
Cook Time8 mins
Total Time18 mins
Course: Dessert
Cuisine: American
Servings: 16 cookies
Calories: 190kcal
Author: Ashley Boyd

Ingredients

Instructions

  • Preheat your oven to 350°F. Line a baking sheet with parchment paper or a silicone baking mat and set it aside.
  • Add the flour, oats, baking powder, and salt to a medium mixing bowl and whisk together until combined. Set the flour mixture aside.
  • Beat the butter, peanut butter, and sugars in the bowl of a stand mixer fitted with the paddle attachment, or in a large mixing bowl with a handheld mixer, until light and creamy, about 3 minutes. Start on low speed then gradually increase the speed to high.
  • Add the egg and vanilla and beat on medium until completely mixed in. Add the flour mixture to the bowl with the butter mixture and beat until no more streaks of dry flour are visible. Start on low speed, then gradually increase the speed to medium-high, scraping down the sides and bottom of the bowl to ensure everything gets evenly mixed.
  • Add the m&m's and chocolate chips to the bowl and beat on low until evenly mixed into the dough. The dough will be slightly crumbly.
  • Using a cookie scoop, scoop about 3 tablespoons (60g) of dough into your palm, form it into a ball, and gently press the ball between your palms to flatten them into a cookie shape. Line the cookies on the baking sheet about an inch apart, and gently press a few more chocolate chips and m&m's into the tops of the cookies.
  • Bake the cookies in the preheated oven on a center rack for 8 to 10 minutes, or until the bottoms just start to turn light golden brown.
  • The cookies will look slightly underbaked and do not spread much at all while baking - that is exactly what you want! The cookies will continue to set as they cool and will be perfectly soft and chewy on the inside. Serve these cookies warm or at room temperature.

Notes

This cookie dough can be made up to three days ahead of time and stored in the refrigerator until ready to bake.
Leftover monster cookies can be stored in an airtight container at room temperature for up to a week or frozen for up to 3 months.

Nutrition

Serving: 1cookie | Calories: 190kcal | Carbohydrates: 28.8g | Protein: 2.6g | Fat: 7.3g | Saturated Fat: 4.3g | Cholesterol: 26mg | Sodium: 163mg | Potassium: 44mg | Fiber: 0.9g | Sugar: 15.5g | Calcium: 15mg | Iron: 1mg