-Preheat oven to 350 degrees. Prep bundt cake pan.
-Sift flour, baking powder, salt, and baking soda together in a bowl.
-Beat butter on high for 30 seconds.
-Add sugar and vanilla extract to the butter until well combined.
-Add egg whites, one at a time, mixing after each.
-Add eggs, one at a time, mixing after each.
-Add 1/3 C flour mixture to the wet mixture followed by adding 1/3 C of the buttermilk; add 1/3 C flour mixture again then add 1/3 C buttermilk mix on low speed, add 1/3 C of flour and add the rest of 1/3 C of buttermilk mix in low speed until thoroughly blended.
-Divide the batter into three bowls.... add orange gel food coloring to one.... add yellow gel food coloring to the second and Leave the batter white in the third bowl.
-Spray the bundt pan with Pam spray.
-Begin by spooning in the white batter then the orange next then last the yellow batter on top.
-Bake the cake at 350 degrees for 30-35 minutes or until an inserted toothpick comes out clean.
-Allow the cake to cool in the pan for about 20 minutes then remove the cake from the Bundt pan and place on a wire rack until completely cooled.
Frosting Directions:
-Cream the butter and powder sugar until it looks light and creamy.
-If it doesn't cream add several drops of the heavy whipping cream until it creams. Once the frosting has the right consistency then divide it into 3 bowls.
-In two of the three bowls add several drops of gel food coloring. 1 st bowl add orange, 2nd bowl add yellow, 3rd bowl stays white. After each color addition stir well to mix the colors.
-When the colors are right, starting with the orange frosting using a spoon drizzle the frosting on the cake. Allow the orange frosting to dry. Next again using a pastry bag or a spoon drizzle the yellow frosting on the cake. Allow it to dry. Lastly, drizzle the white frosting on the cake and allow it to dry completely.