01 -
Combine flour, baking powder and salt in medium bowl.
02 -
Beat butter and sugar until fluffy. Add egg and vanilla.
03 -
Add dry ingredients in two additions until just combined.
04 -
Divide dough in thirds. Color one red, one green, leave one plain.
05 -
Roll each color to 10-inch square, stack with red on bottom, white middle, green on top.
06 -
Roll dough into log starting from one side. Chill 1 hour.
07 -
Slice ¼-inch thick and bake at 350°F for 12-15 minutes.