0.5cupunsweetened cocoa powderDutch-process or natural
0.5tspbaking powder
0.5tspfine sea salt
0.5tspinstant espresso powderoptional but enhances chocolate flavor
1cupsemisweet chocolate chipsfor batter
0.5cupheavy creamfor ganache
1cupsemisweet chocolate chipsfor ganache
1tbspunsalted butterfor ganache, optional shine
Instructions
Preparation Steps
Preheat oven to 350°F. Line a 9x9 inch baking pan with parchment, leaving overhang, and lightly grease.
In a large bowl whisk melted butter, granulated sugar, and brown sugar until glossy and combined.
Whisk in eggs one at a time, then whisk in vanilla until the mixture thickens slightly and looks satiny.
Sift flour, cocoa powder, baking powder, salt, and espresso powder over the bowl. Fold with a spatula just until no dry streaks remain.
Fold in 1.0 cup semisweet chocolate chips. Batter will be thick.
Spread batter into the prepared pan and smooth the top.
Bake 22 to 26 minutes, until a toothpick inserted near the center comes out with moist crumbs but not wet batter. Do not overbake.
Cool completely in the pan on a rack before topping.
For the ganache, gently heat heavy cream in a small saucepan until steaming (do not boil). Pour over 1.0 cup chips and 1.0 tbsp butter in a bowl; let sit 2 minutes, then stir until smooth.
Spread ganache over cooled bars. Chill 20 minutes to set, then lift out with parchment and cut into 16 squares.
Notes
For chewiest bars, pull them from the oven when the center still looks slightly underdone; they will set as they cool. Add flaky sea salt on top for a sweet-salty finish.