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–+ servings
monster cookies on baking sheet.
5 from 1 vote
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Soft & Thick Monster Cookies

These soft & thick monster cookies are made from a super easy peanut butter cookie dough loaded with oats, Reese's pieces, and chocolate chips! With the addition of candy eyes, they have an adorable, spooky look that makes them perfect for a Halloween party.
Prep Time 30 minutes
Cook Time 12 minutes
Chill Time 45 minutes
Total Time 1 hour 27 minutes
Servings18 cookies
Coursecookies
CuisineAmerican
AuthorSloane

Ingredients

  • 160 g (1 ⅓ cup) all-purpose flour
  • 1 teaspoon cornstarch
  • ½ teaspoon baking powder
  • ½ teaspoon baking soda
  • ½ teaspoon kosher salt
  • 113 g (½ cup) unsalted butter, cold & cubed
  • 135 g (½ cup) creamy peanut butter
  • 160 g (¾ cup) brown sugar
  • 50 g (¼ cup) granulated sugar
  • 1 egg
  • 1 egg yolk
  • 1 teaspoon vanilla bean paste or extract
  • 68 g (¾ cup) old fashioned rolled oats
  • 100 g (½ cup) Reese's pieces
  • 85 g chocolate chips
  • Candy eyes, for decorating

Instructions

  • In a medium bowl, whisk together the flour, cornstarch, baking powder, baking soda, and salt. Set aside.
  • In the bowl of a stand mixer fitted with a paddle attachment, cream together the butter and peanut butter on medium speed for 2-3 minutes.
  • Add the sugars and continue beating for 2-3 more minutes until light & fluffy.
  • Beat in the egg, egg yolk, and vanilla until fully combined.
  • Add the dry ingredients and mix on low speed until just combined.
  • Lastly, fold in the oats, Reese's pieces, and chocolate chips with a rubber spatula.
  • Cover the bowl and place in the fridge for at least 30 minutes.
  • Once the dough has chilled, preheat the oven to 350 degrees F (180 degrees C) and line two baking sheets with parchment paper.
  • Use a 3 tablespoon cookie scoop to portion the cookie dough onto a small parchment lined baking sheet.
  • Freeze the cookie dough for 15 minutes.
  • Place the cookie dough on the prepared baking sheets about 2 inches a part, and top with more oats, Reese's pieces, and chocolate chips as desired.
  • Bake the cookies for about 12 minutes.
  • Allow cookies to cool completely on the baking sheet, top with candy eyes if desired, and enjoy!

Notes

  • I recommend using a thick, creamy peanut butter like Jif or Skippy.
  • I recommend using a variety of chocolate chip sizes, as well as a mixture of semi-sweet and bittersweet for visual appeal and balance of chocolate flavor.
  • To achieve perfectly round cookies, use a large cookie cutter or round glass, and gently circle around the cookies when they immediately come out of the oven.

Nutrition Facts

Serving: 1cookie | Calories: 241kcal | Carbohydrates: 30g | Protein: 4g | Fat: 12g | Saturated Fat: 6g | Polyunsaturated Fat: 1g | Monounsaturated Fat: 4g | Trans Fat: 0.2g | Cholesterol: 34mg | Sodium: 150mg | Potassium: 97mg | Fiber: 1g | Sugar: 19g | Vitamin A: 197IU | Vitamin C: 0.03mg | Calcium: 35mg | Iron: 1mg
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