Sift together the flour, baking powder, and the baking soda. Cut in the Crisco or butter like you would a pie crust.
In a separate bowl, cream together the eggs, milk, and sugar. Add to the flour mixture. beat all ingredients until the cookie mixture pulls away from the side of the bowl. If the dough is too sticky, add more flour.
Wrap in wax paper and chill for at least an hour.
Preheat the oven to 350 degrees.
Roll out the chilled dough on a floured surface until it's about a ¼ thickness. Cut into shapes. Place on a cookie sheet covered with parchment paper about an inch or so apart.
Bake cookies for about 10 minutes or until they are just starting to turn brown around the edges. Let the cookies sit on the baking sheet for a few minutes before moving them to a cooling rack. Sprinkle the cookies with colored sugar or frost as desired.