Combine the butter or margarine, sugar and egg in large bowl.
Beat to combine, scraping the bowl often, until creamy.
Add the orange juice and vanilla; mix well.
Reduce speed to low; add the flour and baking powder.
Beat until well mixed. Divide dough into thirds; wrap in plastic food wrap.
Refrigerate until firm (2 to 3 hours).
Heat oven to 400.
Roll out the dough on lightly floured surface, one-third at a time (keeping remaining dough refrigerated), to 1/8- to 1/4-inch thickness.
Cut with 3-inch cookie cutters.
Place 1 inch apart onto ungreased cookie sheets (they will spread) sprinkle with decorator sugar.
Bake for 6 to 10 minutes or until edges are lightly browned.
Cool completely. If you use a 4 to 5-inch cookie cutter, recipe will yield approximately 2 dozen cookies.