- 1 cup margarine
- 2 cups white sugar
- 4 eggs
- 2 (1 ounce) squares unsweetened chocolate, melted
- 1 teaspoon vanilla extract
- 1 cup prepared instant mashed potatoes
- 2 cups sifted all-purpose flour
- 1 teaspoon baking soda
- 1 teaspoon salt
- 3/4 cup buttermilk
- Preheat oven to 375 degrees F (190 degrees C). Grease and flour a 9×13 inch pan. Sift together the flour, baking soda and salt. Set aside.
- In a large bowl, cream together the margarine and sugar until light and fluffy. Beat in the eggs one at a time. Stir in the melted chocolate, vanilla and mashed potatoes. Beat in the flour mixture alternately with the buttermilk, mixing just until incorporated.
- Pour batter into prepared pan. Bake in the preheated oven for 45 minutes, or until a toothpick inserted into the center of the cake comes out clean. Allow to cool.