The Best One Bowl Brownies

Bahan-bahan (12 porsi)

• 4 oz 70% dark chocolate, chopped
• 2 oz semi-sweet chocolate, chopped
• 1/2 cup (1 stick) unsalted butter
• 3/4 tsp coffee granules
• 1/2 cup granulated sugar
• 1/2 cup light brown sugar, lightly packed
• 2 whole large eggs + 1 egg yolk
• 1/2 cup + 2 tablespoons all purpose flour
• 1 tablespoon dutch process cocoa
• 1/2 teaspoon salt
• 1 teaspoon vanilla extract
• 1/2 cup semi-sweet chocolate chips