Mocha Chip Blondies with Coffee Glaze

Name: Mocha Chip Blondies with Coffee Glaze
Prep time: 20 min
Cook time: 20 min
Total time: 40 min
Cuisine: American
Ingredients: 1 1/2 sticks, 12 tablespoons unsalted butter, cut into 12 pieces; 1 1/2 cups packed brown sugar; 2 tablespoons brewed coffee, at room temperature; 1 large egg, at room temperature; 1 tablespoon vanilla extract; 1 1/2 cups flour; 1 1/2 teaspoons baking powder; 3/4 teaspoon kosher salt; 1 cup milk chocolate chips; 1 1/2 cups confectioner's sugar, plus extra if needed; 3 tablespoons brewed coffee, at room temperature, plus extra if needed