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Monster Cookie Fudgy Brownies Recipe

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★★★★

3.8 from 65 reviews

Delight in the ultimate dessert fusion with Monster Cookie Fudgy Brownies, combining rich, fudgy chocolate brownies with classic monster cookies packed with oats, chocolate chips, and M&M’s for a chewy, gooey, and indulgently sweet treat.

Ingredients

Scale

Brownie Batter

  • 1 1/3 cup White granulated sugar
  • 2 Large eggs
  • 1 Egg yolk
  • 5 TBSP Unsalted butter
  • 1/3 cup Oil (canola or vegetable)
  • 1 tsp Pure vanilla extract
  • 1/2 cup All-purpose flour
  • 3/4 cup Unsweetened cocoa powder (dutch process)
  • 1 TBSP Cornstarch
  • 1/4 tsp Salt
  • 1/2 cup Semi-sweet chocolate chips
  • 1/2 cup Milk chocolate chips

Monster Cookie Dough

  • 1/2 cup All-purpose flour
  • 1 tsp Cornstarch
  • 1/2 tsp Baking soda
  • 1/8 tsp Baking powder
  • 1/4 tsp Salt
  • 1/4 cup Unsalted butter (room temperature)
  • 1/3 cup Brown sugar (packed light or dark)
  • 1/8 cup White granulated sugar
  • 1/4 cup Peanut butter (creamy)
  • 1 tsp Pure vanilla extract
  • 1 Large egg (room temperature)
  • 1/2 cup Quick oats
  • 1/2 cup Mini chocolate chips
  • 1/2 cup Mini M&M’s

Instructions

  1. Prepare Monster Cookie Dry Mix: In a medium sized mixing bowl, mix together 1/2 cup all-purpose flour, 1 tsp cornstarch, 1/2 tsp baking soda, 1/8 tsp baking powder, and 1/4 tsp salt. Set aside.
  2. Make Monster Cookie Dough: Using a mixer, beat 1/4 cup room temperature unsalted butter, 1/3 cup packed brown sugar, and 1/8 cup white granulated sugar together for 1 minute on medium speed until light and fluffy. Add 1/4 cup creamy peanut butter, mixing for another minute. Add 1 tsp pure vanilla extract and 1 large egg (room temperature), mixing until combined. Scrape down the bowl and mix again for 20 seconds.
  3. Combine Monster Cookie Ingredients: Gradually add the dry flour mixture into the wet ingredients. Fold in 1/2 cup quick oats, 1/2 cup mini M&M’s, and 1/2 cup mini chocolate chips. Cover the dough and chill in the refrigerator for 40 minutes.
  4. Preheat Oven and Prepare Pan: Preheat oven to 325°F (163°C). Spray a 9×9 inch pan with non-stick baking spray and line the bottom and two sides with parchment paper for easy removal.
  5. Prepare Brownie Dry Mix: In a medium bowl, whisk together 1/2 cup all-purpose flour, 3/4 cup unsweetened dutch-process cocoa powder, 1 TBSP cornstarch, and 1/4 tsp salt. Set aside.
  6. Make Brownie Batter: Using a mixer with a whisk attachment, beat 1 1/3 cups white granulated sugar, 2 large eggs, and 1 egg yolk on medium-high speed for 5 minutes until very light and fluffy. While mixing, melt 5 TBSP unsalted butter and allow it to cool slightly.
  7. Incorporate Wet Ingredients into Brownie Batter: Add the melted butter, 1/3 cup oil (canola or vegetable), and 1 tsp pure vanilla extract to the egg mixture. Mix on low speed until combined.
  8. Add Dry Ingredients and Chocolate Chips: Remove the mixer, then fold in the dry flour mixture gently using a rubber spatula to retain air in the batter. Fold in 1/2 cup semi-sweet chocolate chips and 1/2 cup milk chocolate chips.
  9. Spread Brownie Batter: Pour the brownie batter into the prepared pan and smooth evenly into corners with a rubber spatula.
  10. Partially Bake Brownies: Bake in the preheated oven for 15 minutes to set the top slightly before adding the cookie dough.
  11. Add Monster Cookie Dough Topping: Remove the cookie dough from the fridge. Take small handfuls and flatten each into a disc shape. Place these cookie dough discs evenly on top of the partially baked brownie layer until all dough is used.
  12. Finish Baking: Bake for an additional 20 minutes. Loosely cover the top with foil to prevent over-browning of the cookie dough. Continue baking for another 5-10 minutes until the cookie and brownie layers are firmly set with no jiggle.
  13. Cool: Remove from oven and place brownies on a cooling rack. Let them cool completely to room temperature before cutting.
  14. Store: Store the Monster Cookie Fudgy Brownies at room temperature in an airtight container for freshness.

Notes

  • Chilling the cookie dough helps maintain its shape and prevents spreading during baking on top of the brownies.
  • Lining the baking pan with parchment paper on two sides makes it easier to lift out the entire brownie slab for clean cutting and serving.
  • Be gentle when folding dry ingredients into the brownie batter to keep it light and fudgy.
  • Ensure brownies and cookie top are fully set before removing from the oven to avoid undercooked centers.
  • Allowing brownies to cool completely is crucial for clean slices and proper texture.

Keywords: monster cookie brownies, fudgy brownies, monster cookies, chocolate brownies with cookies, dessert, chocolate chip cookies, M&M brownies, peanut butter cookies, baked dessert

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