1 cup butter
1 egg white , whipped
2 teaspoons pure vanilla extract
21/2 cups unbleached flour
11/2 cups sugar
11/2 teaspoons baking powder
1 teaspoon red food coloring
1 teaspoon blue food coloring
Preheat oven to 350 degrees F.
In a mixing bowl, combine butter, egg white, and vanilla extract.
In a separate bowl, combine flour, sugar, and baking powder. Mix wet ingredients with dry until just moistened.
Divide cookie dough into three equal portions.
Tint one portion with the red food coloring; and another portion with the blue food coloring. Mix thoroughly.
Form each portion into long bars and stack bars on top of each other using alternating colors (red, white, blue).
Wrap finished cookies in waxed paper and place in the refrigerator for about an hour.
Cut cookies into 1/4" thick bars. Place on greased baking sheet and bake for 10 to 12 minutes.