Chocolate Gallettes | La Cucina Grandinetti

Ingredients

• 1/2 pound unsalted butter
• 1 cup brown sugar
• 1 cup white sugar
• 6 large egg yolks
• 6 large egg whites
• 1 teaspoon vanilla
• 9 ounces semisweet chocolate chips
• 1 teaspoon instant coffee or espresso powder
• 1 teaspoon baking powder
• 1/2 teaspoon salt
• 3/4 cup unsweetened cocoa powder
• 2-1/2 cups all-purpose flour
• 4 tablespoons unsalted butter
• 1/2 cup powdered sugar
• 4 tablespoons unsweetened cocoa powder
• 3 to 4 tablespoons milk