Milky Way Brownies!

Name: Milky Way Brownies!
Prep time: 30 min
Cook time: 30 min
Total time: 1 h
Cuisine: American
Ingredients: 1 pound 4 sticks unsalted butter; 1 pound semi-sweet chocolate chips or chopped semi-sweet chocolate; 6 ounces unsweetened chocolate, chopped; 2 tablespoons instant espresso powder or instant coffee; 7 large eggs, at room temperature; 2 tablespoons vanilla extract; 2 1/4 cups sugar; 1 1/4 cups flour; 1 tablespoon baking powder; 1 teaspoon kosher salt; 10 full-sized Milky Way bars (chilled)