Ingredients

1/3 cup butter
1/3 cup plain yogurt
4 (1 ounce) squares German sweet chocolate
1 cup cola-flavored carbonated beverage
2 cups all-purpose flour
1 1/3 cups white sugar
1 teaspoon baking soda
1/2 cup buttermilk
2 eggs
1 teaspoon vanilla extract

Directions

Preheat oven to 350 degrees F (175 degrees C). Grease and flour two 9 inch pans.

In a medium saucepan, heat butter, yogurt, chocolate and cola until chocolate is completely melted.

In a large bowl, mix flour, sugar, and baking soda. Add chocolate mixture, buttermilk, eggs and vanilla. Beat until smooth. Pour batter into two 9 inch round pans.

Bake at 350 degrees F (175 degrees C) for 30 to 35 minutes, or until a toothpick inserted into cake comes out clean.