Monster Cookie Bars
These monster cookie bars are the perfect shareable Halloween dessert, but made with classic flavors that you want to enjoy all year round! Made with a simple peanut butter cookie dough loaded with oats, Reese's pieces, and chocolate chips, these cookie bars are sure to hit with everyone.
Ingredients
- 160 g (1 ⅓ cups) all-purpose flour
- 1 teaspoon cornstarch
- ½ teaspoon baking powder
- ½ teaspoon baking soda
- ½ teaspoon kosher salt
- 113 g (8 tablespoon) unsalted butter, cold & cubed
- 135 g (½ cup) peanut butter, thick & creamy
- 160 g (¾ cup) dark brown sugar
- 50 g (¼ cup) granulated sugar
- 1 egg
- 1 egg yolk
- 1 teaspoon vanilla extract
- 68 g (¾ cup) old fashioned rolled oats
- 100 g (½ cup) Reese's pieces
- 85 g (3 oz) chocolate chips
- Candy eyes, for topping
Instructions
- Preheat the oven to 350 degrees F and line a 9" square pan with parchment paper.
- 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.
- Press the dough into the pan and top with more Reese's pieces and chocolate chips.
- Bake the monster cookie bars for about 22 minutes or until evenly golden. Allow to cool completely in the pan before removing.
- Cut into 16 squares, top with candy eyes, and enjoy!
Notes
- Use a thick & creamy peanut butter. I recommend using a thick, creamy peanut butter like Jif or Skippy.
- Use a variety of chocolate! Use a variety of chocolate chip sizes, as well as a mixture of semi-sweet and bittersweet for visual appeal and balance of chocolate flavor.
Nutrition Facts
Serving: 1bar | Calories: 270kcal | Carbohydrates: 33g | Protein: 5g | Fat: 14g | Saturated Fat: 7g | Polyunsaturated Fat: 2g | Monounsaturated Fat: 4g | Trans Fat: 0.2g | Cholesterol: 38mg | Sodium: 177mg | Potassium: 132mg | Fiber: 1g | Sugar: 20g | Vitamin A: 208IU | Calcium: 36mg | Iron: 1mg
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