Frosted Espresso Brownies

Ingredients

• 1/2 cup (1 stick) unsalted butter
• 1 and 1/2 cups semisweet chocolate chips
• 1 and 1/4 cups granulated sugar
• 3 large eggs
• 2 teaspoons vanilla
• 1 and 1/2 cups all-purpose flour
• 3 tablespoons unsweetened cocoa powder
• 2 tablespoons espresso instant coffee powder
• 1 teaspoon baking powder
• 1/4 teaspoon kosher salt
• 1/2 cup (1 stick) unsalted butter, softened
• 3 cups powdered sugar
• 1 tablespoon coffee extract or strong brewed coffee
• 1 teaspoon espresso instant coffee powder
• 2-3 tablespoons whole milk