Chocolate Sour Cream Frosting

2 ounce(s) 100% Cacao Unsweetened Chocolate Baking Bar
1/2 cup(s) sour cream
3 cup(s) sifted powdered sugar
1 teaspoon(s) vanilla


Beat sour cream with sugar and vanilla until smooth. Mix in melted chocolate. Spread over 9 x 13 cake. Store in refrigerator.