Go Back
+ servings
Stacked cookie bars with M&M's

Monster Cookie Bars

Cookie bars packed with peanut butter, M&M's, oats, and chocolate chips.
Prep Time 20 minutes
Cook Time 35 minutes
Course Dessert
Servings 24

Ingredients
  

  • ¾ cup unsalted butter, softened
  • 1 ⅔ cup granulated sugar
  • 1 cup creamy peanut butter
  • 2 eggs
  • 2 tsp vanilla extract
  • 1 ½ cup all-purpose flour
  • 1 ¼ tsp baking powder
  • ½ tsp salt
  • 1 cup M&M chocolate candies
  • cup quick oats
  • ½ cup semi-sweet chocolate chips

Instructions
 

  • Preheat oven to 350°F.
  • In the bowl of a stand mixer with a paddle attachment, mix the softened butter until smooth. Add the sugar and whip until light and fluffy.
  • Add the peanut butter, combine it, then add the eggs and vanilla, mixing to combine again. Scrape down the sides of the bowl in between new additions.
  • Add the dry ingredients and mix until incorporated. Then, add the chips and oats. Mix to combine, then gently fold in the M&M candies by hand.
  • Transfer the mixture to a 9 x 13 pan lined with parchment paper. Spread into an even layer, then bake the cookie bars for 25 minutes. Check on them. They will likely need more time. Cover them with foil and bake them for 10 minutes more or until they are thoroughly baked.
  • To check if they are done, insert a knife into the center to ensure it is no longer wet. The edges will be golden brown, and the top should be puffy. Allow to cool before cutting the bars. I cut them 6 x 4 to make 24 bars! However, you can cut however many squares you want.

Notes

Nutrition Info:
  • portion size: 57g
  • calories: 266
  • total fat: 14g (saturated fat 6.4g)
  • cholesterol: 30mg 
  • sodium: 111mg
  • totals carbs: 32g
  • fiber: 1.5g
  • sugars: 22g
  • protein: 4.3g
  • calcium: 30mg
  • iron: 1mg
  • potassium: 137mg
Keyword cookie bars, M&M cookies, peanut butter cookies
Tried this recipe?Let us know how it was!