1 bar Butter (salted)
1 tsp. vanilla
1 1/2 c icing sugar
Whip egg whites till soft peaks form, set aside. Mix cake flour, salt, baking powder and cocoa powder. Make a well in the center of the dry ingredients then pour oil, egg yolks, vinegar, food coloring and buttermilk. Mix everything together. Pour egg whites to batter mixture and mix. In a rectangle pan, bake in 350degrees oven for 30- 45minutes. It is done when a toothpick pricked in the middle of the cake comes out clean.
For the icing, makes sure that the cream cheese and butter are at room temperature. With a mixer, beat cream cheese, butter and vanilla. Alternately, pour icing sugar and buttermilk, slowly. Ice your cake, if the icing runs, put your Cake in the freezer for about an hour to harden.