Preheat oven to 325F. Grease or parchment-line a 9×13-inch metal pan. Set aside.
In a large saucepan, combine butter, sugars, and water.
⅔ cup butter, 1 cup granulated sugar, ½ cup brown sugar packed, ¼ cup water
Bring to a boil, stirring regularly.
Remove pan from heat.
Whisk in 1 ¾ cups chocolate chips until melted and well-combined.
Add the eggs and vanilla. Whisk until well-combined.
4 large eggs, 1 teaspoon vanilla extract
Add flour, salt, and baking soda.
1 ½ cups all-purpose flour, ½ teaspoon salt, ½ teaspoon baking soda
Whisk in just until combined. Don’t overmix.
Stir in the remaining 3/4 cup chocolate chips
Pour the batter into the prepared pan, smoothing as needed.
Drop dollops of Nutella over the batter.
1 cup Nutella
Lightly swirl the Nutella into the batter.
Bake for about 35-45 minutes, or until a toothpick inserted in the center comes out with a few fudgy crumbs.
Let the brownies cool to room temperature before cutting and serving.
Notes
Butter: I use salted butter in this recipe. If using unsalted butter, increase the salt to 3/4 teaspoon.
Brown sugar: I use light brown sugar in this recipe.
Chocolate chips: Bittersweet chocolate chips are 60% cacao. A good substitute would be dark chocolate chips.
All-purpose flour: It’s important to use a light hand when measuring flour for brownies. To get the proper amount of flour, weigh the flour or sift or stir the flour. Lightly spoon into the measuring cup and level.