Peanut Butter and Chocolate Monster Cookie Bars

These crowd-pleasing monster cookie bars are full of delicious ingredients like peanut butter, oats, chocolate chips, and candy-coated chocolate.

• Preparation Time: 10 mins
• Cooking Time: 15 mins
• Total Time: 25 mins
• Calories: 292 Calories

Ingredients

• 1 cup brown sugar
• 1 teaspoon vanilla extract
• 1 cup white sugar
• 3 eggs
• 2 teaspoons baking soda
• 0.5 cup butter
• 1.5 cups peanut butter
• 1.5 cups semisweet chocolate chips
• 4.5 cups rolled oats
• 1.5 cups candy-coated milk chocolate pieces (such as M&M's®)

Recipe Instructions

Step 1

Preheat the oven to 350 degrees F (175 degrees C). Lightly grease a 10x15-inch baking pan.

Step 2

Beat together white sugar, brown sugar, and butter in a large bowl with an electric mixer until creamy. Mix in peanut butter and eggs until smooth. Mix in oats, baking soda, and vanilla until incorporated. Stir in chocolate chips and milk chocolate pieces until evenly distributed. Spread in the prepared baking pan.

Step 3

Bake in the preheated oven until lightly brown on top, about 15 minutes. Do not overbake.