Chocolate-Frosted Confetti Party Cake 🎉 The first of four semi-homemade cakes that are perfect for birthdays and celebrations. Comment RECIPE for all of the details and the printable version! Ingredients 1 box white cake mix 1 cup whole milk ½ cup sour cream ½ cup vegetable oil 3 large eggs ½ cup mini chocolate chips ¼ cup rainbow sprinkles ¼ cup chocolate sprinkles 1 cup salted butter, softened 3½ cups powdered sugar ½ cup cocoa powder 4–6 tablespoons heavy cream 1 teaspoon vanilla extract Ext