Fudgy chocolate center.
A thin crackly top.

Next: ingredients
for sixteen squares.

10 tbsp unsalted butter
1 cup granulated sugar
2 large eggs
1 tsp vanilla extract
3/4 cup all-purpose flour
1/2 cup unsweetened cocoa
1/4 tsp fine salt
1/2 cup semisweet chocolate chips

8-inch square metal baking pan
Parchment · medium saucepan
Whisk · mixing bowl · spatula
Measuring cups and spoons
Fine-mesh sieve · cooling rack
Knife

Preheat the oven to 350°F. Line an 8-inch square metal baking pan with parchment paper, leaving overhang on two sides.

Visit the recipe for all instructions.