Monster Cookie Fudgy Brownies Recipe
Introduction
Monster Cookie Fudgy Brownies combine rich, gooey chocolate with peanut butter, oats, and chocolate chips for a delightful twist on classic brownies. These brownies bring extra texture and flavor that cookie lovers will adore.

Ingredients
- Brownie batter (enough for one 9×13-inch pan)
- 1 cup peanut butter
- 1 cup oats
- 1 cup chocolate chips
Instructions
- Step 1: Prepare your brownie batter according to your favorite recipe or package instructions, then spread it evenly in a greased 9×13-inch baking pan.
- Step 2: Drop spoonfuls of peanut butter onto the batter and use a knife to gently swirl it through the batter for a marbled effect.
- Step 3: Sprinkle the oats and chocolate chips evenly over the top of the batter.
- Step 4: Bake in a preheated oven at 350°F (175°C) for 25 to 30 minutes, or until a toothpick inserted near the center comes out with a few moist crumbs but no raw batter.
- Step 5: Allow the brownies to cool completely before cutting into squares to ensure they remain fudgy and hold together well.
Tips & Variations
- Use crunchy peanut butter for added texture or try almond butter for a different nutty flavor.
- Fold some chocolate chips directly into the batter for extra gooey pockets of chocolate.
- For chewier brownies, substitute some of the oats with chopped nuts like walnuts or pecans.
Storage
Store brownies in an airtight container at room temperature for up to 4 days. For longer storage, keep them in the refrigerator for up to a week or freeze for up to 3 months. Reheat gently in the microwave or let come to room temperature before serving.
How to Serve
Serve this delicious recipe with your favorite sides.
FAQs
Can I use store-bought brownie mix for this recipe?
Yes, this recipe works perfectly with any standard brownie mix. Just prepare the batter as directed and add the peanut butter swirl, oats, and chocolate chips as instructed.
How do I prevent the peanut butter from sinking to the bottom?
Swirling the peanut butter gently into the top layer of batter helps it stay distributed. Avoid stirring too vigorously, which can cause it to sink.
PrintMonster Cookie Fudgy Brownies Recipe
Delight in these Monster Cookie Fudgy Brownies, combining rich, fudgy brownie batter with the classic flavors of peanut butter, hearty oats, and melty chocolate chips. This recipe swirls creamy peanut butter into a decadent brownie base for an irresistible treat that blends chewy texture with luscious chocolate goodness.
- Prep Time: 15 minutes
- Cook Time: 25-30 minutes
- Total Time: 40-45 minutes
- Yield: 16 brownies 1x
- Category: Dessert
- Method: Baking
- Cuisine: American
Ingredients
Brownie Batter
- 1 cup unsalted butter, melted
- 2 cups granulated sugar
- 4 large eggs
- 1 teaspoon vanilla extract
- 1 cup all-purpose flour
- 3/4 cup unsweetened cocoa powder
- 1/2 teaspoon salt
Add-ins
- 1/2 cup creamy peanut butter
- 1 cup old-fashioned oats
- 1 cup semi-sweet chocolate chips
Instructions
- Prepare the brownie batter: In a large bowl, combine melted butter and granulated sugar, mixing until smooth. Add eggs one at a time, stirring well after each addition, then mix in vanilla extract. In a separate bowl, whisk together flour, cocoa powder, and salt. Gradually add the dry ingredients to the wet mixture until just combined, being careful not to overmix.
- Add oats and chocolate chips: Fold the oats and chocolate chips gently into the batter, ensuring an even distribution without overworking the mixture.
- Swirl in peanut butter: Pour batter into a greased 9×13-inch baking pan. Drop spoonfuls of peanut butter over the top, then use a knife or skewer to swirl it throughout the batter for a marbled effect.
- Bake the brownies: Preheat the oven to 350°F (175°C). Bake the batter for 25-30 minutes until the edges are set but the center remains fudgy. Test doneness by inserting a toothpick—expect moist crumbs but no raw batter.
- Cool and serve: Allow the brownies to cool completely in the pan before cutting into squares. This ensures they hold their fudgy texture and slice cleanly.
Notes
- Use creamy peanut butter for easy swirling; chunky can be used for added texture.
- Do not overbake to maintain fudginess; check brownies at 25 minutes.
- For a nut-free option, substitute peanut butter with sunflower seed butter.
- Store brownies in an airtight container at room temperature for up to 4 days or refrigerate to extend freshness.
- Oats add chewy texture and a subtle nutty flavor, complementing the rich chocolate.
Keywords: monster cookie brownies,fudgy brownies,peanut butter brownies,oat brownies,chocolate chip brownies,dessert recipe

