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Delicious Monster Cookie Fudgy Brownies stacked on a plate

Monster Cookie Fudgy Brownies

A decadent layer of fudgy brownies topped with a delicious monster cookie mixture of peanut butter, oats, chocolate chips, and M&Ms, perfect for satisfying your sweet tooth.
Prep Time 25 minutes
Cook Time 40 minutes
Total Time 1 hour 5 minutes
Course Dessert, Snack
Cuisine American
Servings 16 pieces
Calories 175 kcal

Ingredients
  

Brownie Base

  • 0.5 cup ½ cup (1 stick) unsalted butter, melted
  • 1 cup 1 cup granulated sugar
  • 2 large 2 large eggs
  • 1 tsp 1 tsp vanilla extract
  • 0.33 cup ⅓ cup unsweetened cocoa powder
  • 0.5 cup ½ cup all-purpose flour
  • 0.25 tsp ¼ tsp salt

Monster Cookie Topping

  • 0.33 cup ⅓ cup creamy peanut butter
  • 0.5 cup ½ cup old-fashioned oats
  • 0.25 cup ¼ cup brown sugar
  • 0.25 cup ¼ cup mini M&M’s
  • 0.25 cup ¼ cup mini chocolate chips
  • to taste Optional: extra M&M’s for topping

Instructions
 

Preparation

  • Preheat your oven to 350°F (175°C) and line an 8x8" pan with parchment paper.
  • In a large bowl, whisk together the melted butter, sugar, eggs, and vanilla until glossy.
  • Gently fold in the cocoa powder, flour, and salt until just combined.
  • Pour the brownie batter into the prepared pan, smoothing it out with a spatula.
  • In a separate bowl, mix the creamy peanut butter, old-fashioned oats, brown sugar, M&Ms, and chocolate chips until thick.
  • Drop spoonfuls of the cookie mixture on top of the brownie batter and gently swirl or press it down.

Baking

  • Bake the combined creation for 35–40 minutes or until a toothpick comes out with moist crumbs.
  • Let the brownies cool completely before cutting them into squares.

Notes

These brownies can be served warm with a scoop of vanilla ice cream on top. They can also be made healthier with low-sugar sweeteners or dairy-free swaps.
Keyword Bake Sale Treats, Easy Brownies, Fudgy Brownies, Monster Cookie Brownies, Peanut Butter Brownies