Buttermilk White Cake

Directions

1. 1
   Preheat the oven to 150 degrees Celsius.
2. 2
   Coat a 24- by 24-centimeter cake pan with parchment paper.
3. 3
   Cream together the butter and sugar until lighter in color. While continuing to beat, add the egg whites one by one.
4. 4
   Separately, sift together the flour, baking powder, and a pinch of salt. Add this dry mixture to the butter mixture and combine well.
5. 5
   Add the buttermilk little by little until well incorporated. Pour the batter into the cake pan.
6. 6
   Bake about 40 minutes. Carefully check the oven as you do not want the cake very golden, but rather white.
7. 7
   For the frosting, stir the fruit juice 1 tablespoon at a time into the powdered sugar until a thick frosting has formed. Frost the cake and serve.