Transform a simple box of cake mix into decadent, fudgy brownies with this easy shortcut. By skipping the water and adjusting the fat, you get bakery-style results with a glossy, crinkly top and chewy edges every time.
Heat the oven to 350°F so it is fully ready when the batter is mixed. Lightly spray an 8x8-inch baking dish with nonstick cooking spray, then set it aside while you build the batter.
If you are choosing the gourmet upgrade, brown your butter separately and let it cool until warm, not hot, before proceeding. This prevents the eggs from scrambling.
Mix the batter until thick and glossy
In a large bowl, combine the cake mix, 1/3 cup vegetable oil, and 2 large eggs. Stir with determination until you do not see any dry pockets. The mixture should look thick, elastic, and almost like soft taffy.
Stir in 1 cup of chocolate chips until they are evenly scattered. The batter should feel heavy and stubborn, which is essential for a dense, fudgy texture.
Bake and cool for the fudgiest set
Spoon the batter into the prepared dish and press it into the corners, smoothing the top. Using a slightly damp spatula can help tame the stickiness.
Bake for 20 minutes. The edges should look set and slightly puffed, while the center still appears a touch underdone. Let the brownies cool completely before slicing to allow carry-over cooking to finish the middle.
Notes
Pro Tip: Use parchment paper to line your pan for bakery-neat edges. This allows you to lift the entire block of brownies out for cleaner slicing once they have cooled.Storage: Store these brownies in an airtight container at room temperature for up to 4 days. They can also be frozen for up to 3 months if wrapped individually in plastic wrap.Common Mistake: Never add the water or milk mentioned on the back of the cake mix box. The secret to the brownie texture is the low moisture and thick batter.Nutrition information is estimated based on common ingredients and serving sizes and may vary.