Chocolate Cappuccino Brownies with Coffee Frosting

Name: Chocolate Cappuccino Brownies with Coffee Frosting
Ingredients: 1¼ cups unbleached, all-purpose flour; 1 tsp. cinnamon; 1 tsp. pure vanilla extract; 4 large eggs, lightly beaten; ½ cup unsalted butter, softened to room temperature; 1 cup chopped pecans, lightly toasted; 1 tsp. salt; 1 tsp. baking powder; 1 tbsp. or more espresso, brewed; ½ tsp. pure vanilla extract; ½ tsp. instant espresso powder; 2 cups confectioners’ sugar, sifted; 2 tbsp. instant espresso powder; 2 cups granulated sugar; 4 oz. unsweetened chocolate, coarsely chopped; ⅔ cup unsalted butter