Yellow Butter Cake with Chocolate Frosting Recipe | Say Mmm

Ingredients

• 2 sticks (1 cup) unsalted butter, at room temperature, plus more for greasing pans
• 1 1/2 cups all-purpose flour, plus more for dusting pans
• 1 1/2 cups cake flour
• 1 tbsp. baking powder
• 1/2 tsp. salt
• 1 3 / 4 cups sugar
• 4 large eggs
• 2 tsp. vanilla extract
• 1 1/4 cups milk
• 1 lb. semisweet chocolate, finely chopped
• 6 tbsp. Dutch-process cocoa powder
• 6 tbsp. boiling water
• 3 sticks (1 1/2 cups) unsalted butter, at room temperature
• 1/2 cup confectioners’ sugar, sifted