Chocolate Frosting

Bahan-bahan (12 porsi)

• 1/2 cup (1 stick) salted butter
• 1½ cups granulated white sugar
• 1¼ cups unsweetened cocoa powder
• 1¼ cups heavy whipping cream
• 1/4 cup full fat sour cream
• 1 teaspoon instant espresso powder
• 2 teaspoons vanilla extract