Chocolate Hazelnut Brownies

Name: Chocolate Hazelnut Brownies
Prep time: 15 min
Cook time: 25 min
Total time: 40 min
Yield: 16 brownies
Ingredients: 1 cup (225g) unsalted butter; 8 oz (225g) dark chocolate, chopped; 1 cup (200g) granulated sugar; 1/2 cup (100g) brown sugar; 4 large eggs; 1 teaspoon vanilla extract; 1 cup (120g) all-purpose flour; 1/2 cup (50g) unsweetened cocoa powder; 1 cup (150g) hazelnuts, toasted and chopped; 1/2 teaspoon salt

Highlighted under: Golden Cooking

I absolutely love making Chocolate Hazelnut Brownies whenever I need a sweet treat. There’s something incredibly satisfying about combining the rich, decadent chocolate with the crunchy texture of hazelnuts. These brownies are not only easy to whip up, but they also make a delightful dessert for gatherings. Whether you’re a chocolate lover or simply looking to impress guests, this recipe will surely satisfy your cravings and provide a warm, comforting atmosphere.

Created by

Camille Norwood

Last updated on 2026-01-12T02:05:35.453Z

When I first made these Chocolate Hazelnut Brownies, I was surprised by how quickly they came together. Using high-quality dark chocolate really elevates the flavor, making it a lavish treat. One tip I learned is to toast the hazelnuts before mixing them in; this brings out their oils and gives a flavorful punch that complements the chocolate beautifully.

Over time, I've experimented with different variations—adding a sprinkle of sea salt on top or swapping some of the flour for cocoa powder for an even richer taste. Each time, these brownies vanish quickly, leaving only satisfied smiles in their wake!

        Why You'll Love These Brownies
        Irresistibly fudgy texture that melts in your mouth
The delightful crunch of toasted hazelnuts
Rich chocolate flavor with a hint of sophistication

      

The Importance of Quality Chocolate

The choice of chocolate is crucial in this brownie recipe, as it significantly impacts the final flavor and texture. Using high-quality dark chocolate (70% cocoa or higher) ensures a rich, intense chocolate taste that balances well with the sweetness of the sugars. Avoid chocolate chips for melting, as they often contain stabilizers that can affect the smooth consistency. A good bar chocolate will melt down to a silky, smooth mixture, enhancing the brownies' fudginess.

When melting the chocolate, a double boiler can be an excellent tool to maintain control over the temperature. This prevents the chocolate from seizing, which can happen if it gets too hot. Stir continuously until the mixture is glossy and combined. If you inadvertently overheat it, adding a small amount of vegetable oil may help salvage the consistency.

Hazelnuts: Toasting for Flavor

Toasting the hazelnuts before adding them to the batter is essential for unlocking their rich, nutty flavor. Spread the chopped hazelnuts on a baking sheet and toast them in a preheated oven at 350°F (175°C) for about 8-10 minutes. You'll know they're ready when they are golden brown and fragrant. Keep an eye on them, as nuts can burn quickly!

If you're looking for a twist, consider substituting hazelnuts with other nuts like pecans or walnuts, although it will alter the flavor profile slightly. Additionally, feel free to mix in chocolate chips or swirl in some caramel for an extra decadent touch. Just remember, if adding ingredients, to maintain the overall balance of dry and wet ingredients in the batter.

Ingredients

For the Brownies

1 cup (225g) unsalted butter
8 oz (225g) dark chocolate, chopped
1 cup (200g) granulated sugar
1/2 cup (100g) brown sugar
4 large eggs
1 teaspoon vanilla extract
1 cup (120g) all-purpose flour
1/2 cup (50g) unsweetened cocoa powder
1 cup (150g) hazelnuts, toasted and chopped
1/2 teaspoon salt

Instructions

Preheat the Oven

Preheat your oven to 350°F (175°C) and grease a 9x13 inch baking pan.

Melt Butter and Chocolate

In a medium saucepan over low heat, melt the butter and dark chocolate together, stirring until smooth.

Mix the Sugars

Remove from heat, then mix in granulated and brown sugars until fully combined.

Add Eggs and Vanilla

Beat in the eggs one at a time, then stir in the vanilla extract.

Combine the Dry Ingredients

In a separate bowl, whisk together flour, cocoa powder, and salt. Gradually fold into the chocolate mixture.

Add Hazelnuts

Gently fold in the toasted hazelnuts until evenly distributed.

Bake

Pour the batter into the prepared baking pan and smooth the top. Bake for 25 minutes or until a toothpick inserted comes out clean.

Cool and Serve

Let the brownies cool in the pan before cutting into squares and serving.

Enjoy these brownies warm for a gooey experience or at room temperature for a firmer bite.

Pro Tips

For an extra indulgence, serve these brownies with a scoop of vanilla ice cream or a drizzle of chocolate sauce on top.

Make-Ahead and Storage Tips

These chocolate hazelnut brownies can be baked a day or two in advance, making them a perfect treat for gatherings. After cooling, store them in an airtight container at room temperature to keep them moist and chewy. Alternatively, you can refrigerate them for up to a week; just allow them to come to room temperature before serving for the best texture.

For longer storage, consider freezing the brownies. Slice them into individual squares, wrap each piece tightly in plastic wrap, and store in a freezer-safe bag. They can be frozen for up to three months. When you're ready to enjoy them, thaw at room temperature or microwave for a few seconds until just warmed.

Serving Suggestions

While these brownies are delicious on their own, serving them warm with a scoop of vanilla ice cream creates a delightful contrast of textures. Drizzle some warmed chocolate sauce or caramel over the top for an extra indulgent dessert that feels special. Alternatively, a sprinkle of sea salt right before serving can elevate the flavors and add an exciting twist.

For a more rustic presentation, cut the brownies into larger pieces and plate them alongside fresh berries. This not only adds color but also complements the rich chocolate with a touch of tartness. Pair them with a robust coffee or a dessert wine to enhance the overall experience.

Questions About Recipes

→ Can I substitute the hazelnuts for another nut?

Yes! You can use walnuts, pecans, or even almonds as alternatives.

→ How should I store the brownies?

Store them in an airtight container at room temperature for up to a week.

→ Can these brownies be frozen?

Absolutely! Wrap individual pieces tightly in plastic wrap and freeze for up to two months.

→ What can I use instead of eggs for a vegan version?

You can try using flax eggs or unsweetened applesauce as egg substitutes in this recipe.