Sift together flour, baking powder & baking soda.
Cut in margarine to make consistency like pie crust.
Beat the eggs & add sugar, milk, vanilla & salt.
Mix the egg mixture into the flour mixture.
Cover dough in bowl & chill for at least 2 hours.
Once chilled, sprinkle flour on counter or hard surface & roll dough out into flat sheet. Use cookie cutters to cut out shapes & place on cookie sheet with parchment paper.
Bake 7-8 minutes at 350 degrees. Transfer to wire rack or wax paper, allow to cool. Decorate as desired!