Ingredients
1cupbutter,softened
2⅓cupssugar
5egg whites
1tbspvanilla
3cupsflour
4tspbaking powder
½tspsalt
1½cupsmilk,warmed for 30 sec in microwave to bring to room temp
Rainbow colors of Gel food coloring
1cupbutter,(2 sticks), softened
4cupspowdered sugar,sifted
1tbspclear vanilla
tiny pinch salt
3tbspmilk
Preparation
Preheat the oven to 350 degrees F.
In a stand mixer, cream the butter and sugar together for 2 to 3 minutes until much lighter in color, like a easter-y spring yellow.
Add in the egg whites and vanilla until totally combined.
Add the salt and baking powder to the flour.
Add in the dry ingredients and the milk alternating 1 cup of flour and ½ cup of milk at a time.
Add one cup of the batter to 6 different bowls.
Color each bowl with gel food coloring in red, orange, yellow, green, blue and purple.
Mix until the colors are fully combined.
Add the batter to 6 sandwich size ziploc bags and pipe just enough to make a thin layer of each color (maybe ¼ inch tall batter layers).
Bake for 18 to 20 minutes.
Whip the butter in a stand mixer with a paddle attachment until the butter is lighter in color.
Add in the vanilla.
Add in the powdered sugar in 1-cup increments with the milk, 1 tablespoon at a time, ending with powdered sugar.
Mix on high for 1 minute after each addition.
Using a closed star tip and decorating bag, pipe frosting onto the cooled cupcakes.
