3 ounces semi-sweet chocolate (cocoa or chocolate chips)
1 1/2 teaspoons vanilla extract
1 cup buttermilk
3 1/2 cups white flour
3 teaspoons baking powder
1 teaspoon baking soda
1/2 teaspoon salt
vegetable oil to fill pan 1/2 inch
Cream together sugar and eggs. Melt butter and chocolate in a saucepan over a low heat. Add to creamed mixture.
Mix vanilla extract into the buttermilk, then stir into the sugar mixture. Combine flour, baking powder, baking soda and salt. Stir in the liquid mixture. Chill slightly, then roll out half the dough on a lightly floured board to 1 inch thickness and cut out doughnuts.
Let doughnuts dry for 10 minutes. Heat vegetable oil in a skillet to around 360-375 degrees. Fry each doughnut about a minute and a half per side, then remove and drain on paper towels. Frost when cool.