Triple-Chocolate Espresso Brownies | America's Test Kitchen

Ingredients

• 5 ounces (142 grams) semisweet chocolate or bittersweet chocolate, chopped
• 2 ounces (57 grams) unsweetened chocolate , chopped
• 8 tablespoons unsalted butter (1 stick), cut into quarters
• 3 tablespoons cocoa powder
• 1 1/2 tablespoons instant espresso powder or coffee powder
• 3 large eggs
• 1 1/4 cups granulated sugar (8.75 ounces/248 grams)
• 2 teaspoons vanilla extract
• 1/2 teaspoon table salt
• 1 cup unbleached all-purpose flour (5 ounces/142 grams)