01 -
Preheat the oven to 350°F. Line a regular sized muffin tin with cupcake liners.
02 -
In a medium mixing bowl, combine egg whites, vegetable oil and grape soda using a handheld mixer on medium-low speed until well mixed.
03 -
Lower mixer speed to low. Add cake mix and grape drink mix. Mix just until incorporated and batter is uniform in color. Add purple gel food coloring if desired for deeper color.
04 -
Fill cupcake liners ⅔ full. Bake for 15 minutes, or until a toothpick comes out with just a few crumbs. Remove from tin and cool completely on a wire rack.
05 -
Beat softened butter, vanilla and almond extract for 1-1½ minutes until light and fluffy using a stand mixer or handheld mixer on medium-high speed.
06 -
Lower mixer speed and add sifted powdered sugar 1 cup at a time, alternating with heavy cream. Increase to medium-high speed until smooth. Add purple gel food coloring and mix until uniform.
07 -
Fill a piping bag fitted with a shaped tip with frosting. Pipe in a spiral pattern over each cooled cupcake. Sprinkle with purple sparkling sugar if desired.