This recipe is my go-to when I need a fast, show-stopping dessert that tastes like a hug. These Nutella brownies are dense, fudgy, and full of that unmistakable hazelnut-chocolate flavor that makes everyone smile. I discovered this combination on a rainy afternoon while trying to use up an open jar of Nutella; the result was so rich and perfectly textured that it immediately went into weekly rotation. The batter is made in one bowl and finished with extra Nutella swirled on top, giving each square a luxurious ribbon of chocolate-hazelnut goodness. What makes these brownies special is their texture — moist and almost ganache-like in the center with a slightly crisp top edge if you bake just a bit longer. They’re forgiving: underbake slightly for fudgy centers or bake a touch more for sliceable brownies. This flexibility has led to many successful bake attempts at parties, school events, and last-minute dinner guests. My family particularly remembers bringing these to a holiday cookie exchange; they vanished first.

Ingredients

• Unsalted butter (1/2 cup / 1 stick): Use unsalted for control over sodium; melt gently to avoid burning. High-quality European-style butter adds depth.
• Dark chocolate (3 oz): Finely chop a 50–70% cocoa dark chocolate bar or use semi-sweet chocolate chips; this deepens the chocolate backbone without overpowering the Nutella.
• Granulated sugar (2/3 cup): Standard white sugar gives structure and a subtle crust on top; for a chewier edge you can substitute part with light brown sugar.
• Vanilla extract (2 tsp): Real vanilla rounds and brightens chocolate flavors — use pure extract for best aroma.
• Eggs (2 large) + 1 large egg yolk: Room temperature eggs emulsify the batter and create a tender, fudgy crumb; reserve the white from the extra egg yolk if needed for another use.
• Nutella (1 1/4 cups total): Divide into 3/4 cup for the batter and 1/2 cup for swirls; commercially prepared spread is recommended for stable texture.
• All-purpose flour (1 cup): Provides structure while keeping the brownies tender — avoid over-mixing to maintain fudginess.
• Salt (1/4 tsp): Balances sweetness and enhances the chocolate and hazelnut flavors.

Instructions

Preheat and prepare the pan: Preheat the oven to 350°F. Line an 8x8-inch pan with parchment paper or foil with an overhang for easy removal; a 9x9-inch pan will work but yields thinner brownies. Position an oven rack in the center for even baking. Melt butter and chocolate: In a microwave-safe bowl melt the butter and chopped chocolate together in 40–45 second bursts on medium power, stirring between bursts until smooth. Alternatively use a double boiler set over gently simmering water, stirring until glossy. Incorporate sugar and Nutella: Whisk granulated sugar into the warm chocolate mixture until smooth. For easier blending, microwave 30–60 seconds to loosen the Nutella, then whisk 3/4 cup Nutella into the chocolate-sugar mix until fully incorporated and glossy. Mix eggs and vanilla: Whisk the two whole eggs and the extra yolk in a small bowl. Temper the eggs by whisking a few tablespoons of the warm chocolate mixture into the eggs, then whisk the egg mixture back into the main bowl. Add vanilla and whisk until smooth and slightly thickened. Fold in dry ingredients: Sift or add the flour and 1/4 teaspoon salt into the bowl and gently fold with a rubber spatula just until no streaks of flour remain. Avoid vigorous mixing to keep a fudgy texture. Transfer to pan and swirl: Pour batter into the prepared pan and smooth the top. Drop the remaining 1/2 cup Nutella in spoonfuls across the batter (about 16 spoonfuls of 1–2 teaspoons each). Use a skewer or toothpick to gently swirl the Nutella into a marbled pattern without fully mixing it in. Bake: Bake in the center of the preheated oven for 30–35 minutes for an 8x8 pan. For a 9x9 pan check at 22–27 minutes. A toothpick inserted in the center should come out with moist crumbs but not raw batter — a few glossy crumbs indicate fudgy brownies. Cool and cut: Cool the brownies completely in the pan. Once the pan is no longer warm, lift the overhang to remove. Place on a cutting board and slice with a sharp knife, wiping it clean between cuts for neat squares.

Storage Tips

Store the cooled squares in a single layer or separated by parchment in an airtight container at room temperature for up to four days. If you live in a warm climate, keep them in the fridge to prevent the Nutella swirls from becoming too loose; allow refrigerated brownies to come back to room temperature before serving to restore softness. For longer storage, wrap tightly in plastic and freeze for up to three months. Thaw overnight in the refrigerator and bring to room temperature on the counter. Reheat gently for 8–10 seconds in the microwave for a freshly-baked sensation.

Ingredient Substitutions

If you don't have dark chocolate, use semi-sweet chips or a mix of milk and dark for a milder flavor. Swap up to half the granulated sugar for light brown sugar for extra chew and a hint of caramel. To add crunch, fold in 1/2 cup chopped toasted hazelnuts or walnuts. Gluten-free all-purpose flour (cup-for-cup) can replace regular flour, but texture may vary slightly. For a dairy-free attempt, use a dairy-free chocolate and vegan butter and replace eggs with flax egg alternatives, though results will be less fudgy and more cake-like.

Serving Suggestions

Serve slightly warm with a dollop of whipped cream or a scoop of vanilla ice cream to offset the richness. Garnish with toasted hazelnuts or a light dusting of cocoa powder for presentation. For a party, cut into small squares and serve on a platter with berries and espresso. These also make lovely homemade gifts — stack squares in a box with parchment and tie with a ribbon.

Cultural Background

While brownies are an American classic dating back to the early 20th century, this version celebrates the global popularity of hazelnut-chocolate spread. Nutella itself was popularized in Europe after World War II as a way to stretch chocolate supplies with hazelnuts. Combining the dense, American-style chocolate bar with Italian-inspired hazelnut spread creates a cross-cultural treat that blends texture and flavor traditions.

Seasonal Adaptations

In cooler months, fold in 1/2 teaspoon of instant espresso for depth or add a pinch of cinnamon and nutmeg for holiday warmth. In summer, serve chilled with fresh raspberries to cut the richness. For a festive twist, swirl in white chocolate and top with crushed peppermint for winter celebrations. Nutella pairs beautifully with seasonal fruits like sliced strawberries in spring.

Meal Prep Tips

Make the batter ahead and refrigerate in an airtight container for up to 24 hours; allow it to come back to room temperature before baking. For grab-and-go treats, bake and freeze individual squares separated by parchment so you can pull out a portion as needed. Label containers with the bake date and reheat quickly in the microwave for 8–12 seconds to enjoy freshly-warmed flavor.

These brownies are comfort food at its best — easy, indulgent, and adaptable. Whether you’re baking for a crowd or a quiet night in, they deliver consistent, crowd-pleasing results. Make them your own by adding nuts, caramel, or a sprinkle of flaky sea salt on top for a professional finish.