Christmas Cookie Pinwheels

• 1 Egg

• 2 cups All-purpose flour

• 1/2 tsp Baking powder

• 1/2 tsp Liquid green food coloring

• 1/2 tsp Liquid red food coloring

• 1/4 tsp Salt

• 3/4 cup Sugar

• 1 tsp Vanilla extract

• 12 tbsp Butter, unsalted