"I love my mom's simple, flavorful sugar cookie dough so much...."
For the Cookies:
shortening
sugar
grated orange or lemon zest
vanilla
whole egg
milk
flour
baking powder
salt
For the Egg Yolk Glaze:
whole egg yolk
water
drops (to 3) food coloring
For the White Decorative Icing:
bag 2 lb. powdered sugar
milk
egg white (optional)