Frosted Chocolate Walnut Brownies (Fudgy, Rich, and Ready in Under an Hour)
Some desserts are made for sharing, and some are made for sneaking a second square before anyone notices. These frosted chocolate walnut brownies fall firmly into the second camp. Dense and fudgy with chopped walnuts and chocolate chips packed into every bite, they are finished with a silky chocolate butter frosting that takes them from great to completely over the top.
This is the kind of chocolate dessert recipe that earns a permanent spot in your rotation. It looks impressive enough to bring to a party, simple enough to make on a weeknight, and rich enough that a small square is all you need (though no one will blame you for going back for more).
Why You Will Love This Recipe
- Simple pantry ingredients and no fancy equipment required.
- Triple chocolate: unsweetened cocoa powder in the batter, semi-sweet chocolate chips folded in, and a chocolate butter frosting on top.
- Chopped walnuts add crunch and balance the deep richness of all that chocolate.
- Fudgy rather than cakey, thanks to minimal mixing and a careful bake time.
- Ready in under an hour from start to finish, making them a realistic weeknight or party dessert.
Ingredients
How To Make Chocolate Walnut Brownies
Step 1: Cream the butter and sugar together in a large mixing bowl, then add the eggs and vanilla and mix until combined.
Step 2: In a separate bowl, whisk together the flour, cocoa powder, and salt. Slowly fold the dry ingredients into the wet mixture until just incorporated. This is the most important step: stop mixing as soon as you no longer see dry streaks. Over-mixing develops gluten and turns fudgy brownies into a cakey situation.
Step 3: Fold the chocolate chips and chopped walnuts into the batter.
Step 4: Transfer the batter to your prepared pan, spread it into an even layer, and bake for 22 to 26 minutes. The center will still look slightly underset when you pull them out. That is exactly right. They finish setting as they cool on the counter.
Step 5: To make frosting, mix butter with cocoa powder and 1 cup powdered sugar. Add milk one tablespoon at a time until the desired consistency is reached. Adjust with remaining powdered sugar to thicken if needed.
Step 6: Spread frosting over cooled brownies, slice, and serve. Enjoy!
Tips for the Best Results
- Cool completely before frosting. Even a slightly warm brownie will cause the frosting to melt and slide. Patience here makes a real difference in how the final slices look.
- For the cleanest cuts, pop the frosted pan in the refrigerator for 20 to 30 minutes before slicing, and wipe the knife clean between each cut.
- These are a fudgy brownie by design. If you prefer something a little closer to cakey, increase the bake time by a few minutes rather than changing the batter.
Chocolate Walnut Brownies FAQs
Yes! Bake the brownies, let them cool, and store them in an airtight container. Frost just before serving for the best texture.
Keep in an airtight container at room temperature for up to 4 days, or freeze for up to 2 months.
Absolutely! Pecans, almonds, or macadamia nuts work well.
Use slightly less flour and bake on the shorter end of the time range.
Tried these Chocolate Walnut Brownies? Please rate the recipe and leave a comment below to let us know how they turned out. Your feedback helps others find and enjoy it too!
Frosted Chocolate Walnut Brownies
Equipment
- 8×8-inch baking pan
- Parchment paper
- Mixing bowls
- Hand mixer or stand mixer
- Rubber spatula
- Measuring cups and spoons
- Cooling rack
Ingredients
For the brownies
- Non-stick cooking spray
- 1 cup unsalted butter (softened)
- 1½ cups granulated sugar
- 4 large eggs
- 2 teaspoons vanilla extract
- 1 cup all-purpose flour
- 1 cup cocoa powder
- ¼ teaspoon salt
- 1 cup semi-sweet chocolate chips
- 1 cup chopped walnuts
For the frosting
- ½ cup unsalted butter (softened)
- ⅓ cup cocoa powder
- 1 to 1½ cups powdered sugar
- 2 to 3 tablespoons whole milk
Instructions
- Preheat the oven to 350°F. Line an 8×8-inch baking pan with parchment paper and lightly coat with non-stick cooking spray.
- In a large mixing bowl, cream the butter and granulated sugar until light and smooth. Add the eggs and vanilla extract, then mix until fully combined.
- In a separate bowl, whisk together the flour, cocoa powder, and salt. Slowly add the dry ingredients into the wet ingredients and mix just until combined. Avoid overmixing to keep the brownies soft and fudgy.
- Fold in the chocolate chips and chopped walnuts using a rubber spatula. Transfer the batter to the prepared baking pan and spread into an even layer.
- Bake for 22 to 26 minutes, or until a toothpick inserted into the center comes out with a few moist crumbs. The brownies will continue to set as they cool.
- Let the brownies cool completely in the pan before frosting.
- To make the frosting, beat the butter and unsweetened cocoa powder together in a medium bowl. Add 1 cup powdered sugar and mix until combined. Add milk, 1 tablespoon at a time, until the frosting reaches a smooth, spreadable consistency. Add the remaining powdered sugar if a thicker frosting is desired.
- Spread the frosting evenly over the cooled brownies. Slice into squares and serve.
Notes
- For extra fudgy brownies, slightly underbake and allow them to cool completely before slicing.
- Toasted walnuts add deeper flavor and extra crunch.
- Chill the brownies for 20 minutes before cutting for cleaner slices.
- Store leftovers in an airtight container at room temperature for up to 3 days.
More Sweet Treats To Try Next
- If you have overripe bananas on the counter, this eggless banana bread is exactly where they belong. One bowl, no butter, no eggs, loaded with chocolate chips and crunchy almonds, and done in an hour.
- Salted pretzel brownies bring that perfect sweet and salty balance with a rich, fudgy center and a crisp pretzel topping that adds just the right crunch. Each bite has a deep chocolate flavor with a slight chew and those little pockets of salt that make it hard to stop at one piece. This is the kind of dessert that works just as well for casual baking days as it does for parties and potlucks.
