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stack of chocolate hazelnut brownies on a plate in front of a jar of milk

Chocolate Hazelnut Brownies

Chocolate hazelnut brownies are swirled with Nutella and they come together quickly without a mixer--just a spoon and a bowl. They're easy to make and sure to satisfy all your chocolate cravings!

Course Dessert
Cuisine American
Prep Time 15 minutes
Cook Time 25 minutes
Total Time 40 minutes
Servings 9
Author Kelsie


  • 1/2 cup unsalted butter cut into several chunks
  • 3 ounces unsweetened chocolate finely chopped
  • 2 large eggs
  • 1 cup granulated sugar
  • 1 teaspoon vanilla extract
  • 1/4 teaspoon baking soda
  • 1/4 teaspoon salt
  • 2/3 cup all-purpose flour
  • 3/4 cup chopped toasted hazelnuts
  • 1/2 cup Nutella


  1. Preheat the oven to 350 degrees. Spray an 8-inch square baking dish with cooking spray and set aside.
  2. Combine the chocolate and butter in medium a microwave-safe bowl and heat in 30-second intervals, stirring after each interval, until chocolate is melted and mixture is smooth.
  3. Set aside to cool for 5 minutes.
  4. Stir the eggs and sugar into the chocolate mixture, mixing well. Mix in the vanilla, baking soda, and salt until well combined.
  5. Fold in the flour, until just combined (just mix until you no longer see streaks of flour in the brownie batter).
  6. Fold in the hazelnuts.
  7. Pour the batter into the prepared pan and smooth the top. Dollop the Nutella over the brownie batter and use a butter knife to swirl the two together.
  8. Bake for 25 to 30 minutes, until the top of the brownies looks set. Set pan on a wire rack and cool completely before slicing and serving.

Recipe Video

Recipe Notes

  • If you only have salted butter you can use that, just omit the salt in the recipe and be aware that your brownies will turn out a little saltier than mine did (that’s not a bad thing if you ask me—I like salty sweets).
  • If you don’t have unsweetened chocolate you can use dark chocolate or even semi-sweet but your brownies won’t be as rich.
  • You can skip the Nutella swirl on top but I love the extra pop of flavor and gooeyness that it adds.
  • Uneaten brownies can be stored at room temp (covered) for about a day, in the fridge (covered) for up to four days, or in the freezer, tightly wrapped, for up to three months.