Chocolate Hazelnut Brownies

Name: Chocolate Hazelnut Brownies
Prep time: 15 min
Cook time: 25 min
Total time: 40 min
Yield: 12 brownies
Ingredients: 1 cup (225g) unsalted butter; 8 oz (225g) dark chocolate; 1 cup (200g) granulated sugar; 3 large eggs; 1 teaspoon vanilla extract; 1 cup (120g) all-purpose flour; 1/2 teaspoon salt; 1 cup (150g) hazelnuts, toasted and roughly chopped

Highlighted under: Baking & Desserts

I absolutely adore baking, and today, I’m thrilled to share my Chocolate Hazelnut Brownies recipe with you! These decadent brownies have a rich chocolate flavor and are perfectly complemented by the crunch of toasted hazelnuts. Each bite is a heavenly treat that satisfies both my chocolate cravings and my love for nuts. The process is straightforward, and the end results are sure to impress anyone who indulges. Let’s make dessert dreams come true together!

Created by

Sophia Lane

Last updated on 2026-01-13T05:07:18.479Z

When I first tried adding hazelnuts into my classic brownie recipe, I was taken aback by how well they complemented the rich chocolate. The nutty crunch adds a delightful texture that I can't get enough of. I especially love to toast the hazelnuts before mixing them in, as it enhances their flavor and aroma. It’s a little step that truly makes a difference!

Another tip I’d like to share is about the chocolate melting process. I prefer using high-quality dark chocolate which I melt slowly over low heat, ensuring it doesn’t seize. This small detail ensures the brownies are ultra-fudgy and rich. Trust me, the result is absolutely worth the effort!

        Why You Will Love This Recipe
        Rich chocolate flavor paired with the delightful crunch of hazelnuts
Perfectly fudgy texture that remains moist and satisfying
Simple and quick to make, perfect for any occasion

      

Baking Techniques for Success

One key to achieving the perfect fudgy texture in your brownies is to melt the butter and dark chocolate gently. Use low heat to prevent the chocolate from seizing, as high heat can lead to a grainy texture rather than a smooth one. Stirring frequently will not only help control the heat but also ensure that the mixture remains glossy and well combined.

When mixing in the granulated sugar and eggs, be mindful of the temperature of your chocolate mixture; it should be just warm, not hot. This helps incorporate the eggs without cooking them, which is essential for a velvety smooth brownie. Whisking the eggs in one at a time allows for better emulsification, contributing to the moist texture we desire.

Ingredient Insights

Toasted hazelnuts not only add a delightful crunch but also bring a rich, nutty flavor that complements the chocolate beautifully. If you're short on hazelnuts, feel free to substitute them with walnuts or pecans, though the flavor profile will change slightly. Make sure to watch the nuts as they toast; they typically need about 8-10 minutes at 350°F (175°C) until fragrant and golden.

Using high-quality dark chocolate can significantly enhance the taste of your brownies. Aim for chocolate that is 60-70% cocoa; this balance contributes to a deep chocolate flavor without overwhelming sweetness. If you prefer a sweeter brownie, consider using semi-sweet chocolate, but adjust the sugar accordingly to avoid an overly sweet result.

Ingredients

For the Brownies

1 cup (225g) unsalted butter
8 oz (225g) dark chocolate
1 cup (200g) granulated sugar
3 large eggs
1 teaspoon vanilla extract
1 cup (120g) all-purpose flour
1/2 teaspoon salt
1 cup (150g) hazelnuts, toasted and roughly chopped

Instructions

Preheat and Prepare

Preheat your oven to 350°F (175°C). Grease a 9x13 inch baking pan and line it with parchment paper.

Melt Chocolate and Butter

In a medium saucepan over low heat, melt the butter and dark chocolate together, stirring frequently until smooth. Remove from heat and allow it to cool slightly.

Mix in Sugar and Eggs

Once the chocolate mixture is slightly cool, whisk in the granulated sugar. Then, add the eggs one at a time, mixing well after each addition, and stir in the vanilla extract.

Combine Dry Ingredients

In a separate bowl, whisk together the flour and salt. Gradually fold the dry ingredients into the chocolate mixture until just combined.

Add Hazelnuts

Gently fold in the toasted hazelnuts until evenly distributed throughout the batter.

Bake

Pour the brownie batter into the prepared pan and spread evenly. Bake in the preheated oven for 25 minutes, or until a toothpick inserted into the center comes out with a few moist crumbs.

Cool and Cut

Allow the brownies to cool in the pan for about 10 minutes before lifting them out with the parchment. Transfer to a wire rack to cool completely before cutting into squares.

Pro Tips

For extra chocolatey flavor, consider adding chocolate chips to the batter. Storing leftover brownies in an airtight container will keep them fresh for up to a week.

Storage and Freezing

Once your brownies have cooled completely, they can be stored in an airtight container at room temperature for 3-4 days. If you want to keep them fresh for longer, you can also refrigerate them, where they’ll last about a week. Just make sure to let them come to room temperature before enjoying for the best texture.

For long-term storage, brownies freeze really well. Cut them into squares and wrap each piece individually in plastic wrap, then place them in a zip-top freezer bag. They can last in the freezer for up to three months. To enjoy, simply thaw at room temperature or heat them for a few seconds in the microwave for that fresh-baked taste.

Serving Suggestions

Serving your chocolate hazelnut brownies warm is a delightful experience. Pairing them with a scoop of vanilla ice cream or a drizzle of chocolate sauce can elevate your dessert to a whole new level. For a touch of elegance, sprinkle some sea salt on top right before serving for a great contrast to the sweet, rich flavors.

You can also get creative with toppings! Consider adding a layer of chocolate ganache or a dusting of powdered sugar for a decorative finish. If you're feeling adventurous, try incorporating a layer of Nutella between the brownie batter for an extra chocolate-hazelnut indulgence that will surely impress your guests.

Questions About Recipes

→ Can I use milk chocolate instead of dark chocolate?

Yes! Using milk chocolate will give the brownies a sweeter flavor, but the texture will still be delicious.

→ How do I store leftover brownies?

Store the brownies in an airtight container at room temperature for up to a week or in the refrigerator for longer freshness.

→ Can I substitute the hazelnuts with another nut?

Absolutely! Walnuts or pecans would be great alternatives if you prefer.

→ What if I want to make these brownies gluten-free?

You can replace the all-purpose flour with a 1:1 gluten-free flour blend.