Preheat oven to 350 degrees F. Line a 9x13 baking pan with parchment paper.
In a large bowl, whisk together melted butter, brown sugar, granulated sugar, and vanilla until well combined.
1 cup unsalted butter, 1 ½ cups light brown sugar, ½ cup granulated sugar, 1 tablespoon vanilla extract
Whisk eggs, one at a time, until thoroughly blended together.
4 large eggs
Add flour, cocoa powder, and salt. Stir until just combined, but don’t overmix!
1 ¼ cups sifted all-purpose flour, 1 cup unsweetened cocoa powder, 1 teaspoon kosher salt
Using a rubber spatula, fold in the chocolate chips.
1 cup semi sweet chocolate chips
Add raspberries, then use the spatula to gently fold them in.
2 cups fresh raspberries
Pour batter into the prepared pan. Top with a few additional raspberries and chocolate chips.
Bake for about 30-40 minutes. The edges should look dry and set, but there should still be fudgy crumbs when a toothpick is inserted into the middle.
Cool in the pan until room temperature before cutting and serving.
Notes
Butter: If using salted butter, reduce the salt to 1/2 teaspoon salt.
Brown sugar: Light or dark brown sugar will work.
All-purpose flour: I highly recommend weighing the flour for the most accurate measurements (click on “metric” just above the ingredients for the weights). You can also stir or sift the flour, lightly spoon it into the measuring cup, and level. Be careful to avoid packing the flour as that will give you dry or cakey brownies.
Unsweetened cocoa powder: I’ve only used unsweetened cocoa powder and haven’t tried using Dutch-process cocoa powder in this recipe.
Salt: If using table salt, halve the amount of salt.
Chocolate chips: The brownies are more dark-chocolate flavored. If you would like sweeter brownies, you can use milk chocolate chips or even white chocolate chips.