Chocolate Cake Mix Brownies are gooey, fudgy brownies loaded with rich chocolate flavor. These delicious semi homemade brownies stir together in minutes for an easy dessert chocolate lovers will adore.
Preheat the oven to 325. Line an 8x8 square baking pan with parchment paper or aluminum foil, leaving an overhang for easy removal.
Whisk the cake mix, brown sugar, and espresso powder together in a large mixing bowl.
Add the egg, egg yolks, melted butter, and 1 cup of chocolate chips. Stir the mixture together with a spatula until just combined.
Spread the mixture evenly into the prepared pan. Sprinkle the remaining chocolate chips on top, gently pressing them into the brownie batter. Add a little flaky sea salt on top, if desired.
Bake for 25-35 minutes or until a toothpick inserted 2 inches from the edge of the pan comes out with moist crumbs. For fudgy brownies, the internal temperature should read 180-190 degrees.
Cool the brownies completely on a wire baking rack. Lift the brownies out of the pan with the foil sling, peel off the foil, and place the entire slab on a cutting board. Use a sharp knife to cut the brownies into squares.
Notes
Check for doneness a few minutes early to avoid overbaking.
Use room temperature eggs to ensure the brownie batter comes together smoothly. Cold eggs may solidify the melted butter.