01 -
1 cup butter, room temperature.
02 -
1½ cups powdered sugar.
03 -
1 large egg, room temperature.
04 -
2 teaspoons vanilla extract.
05 -
3 cups all-purpose flour.
06 -
1 teaspoon baking powder.
07 -
¼ teaspoon kosher salt.
08 -
2 teaspoons water (if needed).
09 -
2½ cups powdered sugar (for icing).
10 -
1¼ tablespoons meringue powder.
11 -
3-4 tablespoons lukewarm water.
12 -
¼-1 teaspoon clear vanilla extract.
13 -
Gel food coloring (red, green, blue).