Step 1

Preheat oven to 350° F. Grease an 8x8-inch metal baking pan with cooking spray. (Do not use a 9x9-inch pan or the brownies will be too thin and overbake.) Line the bottom and two opposite sides of the pan with a sheet of parchment paper, leaving a bit of overhang on the two edges of the pan.

Step 2

Place the melted butter in a large bowl. Add both sugars and mix in with a hand mixer* until combined.

Step 3

Add the eggs, vanilla and salt. Beat with the hand mixer first on low to combine, then on medium speed for about 1 minute.

Step 4

Add the flour and cocoa powder. Mix in with a rubber spatula until just combined, being careful to not overmix. Gently stir in the chocolate chips.

Step 5

Transfer the batter into the prepared baking pan and use the spatula to spread it out into an even layer.

Step 6

Bake for 25-32 minutes. For fudgier brownies, bake less (a toothpick should come out a little bit gooey). For more done brownies, a toothpick should come out clean.

Step 7

Let cool in the pan completely before slicing. Remove from the pan using the parchment overhang and cut into brownies.