Place margarine in large mixing bowl and whip on medium high speed until light and fluffy. Gradually add sugar and gelatin and cream well. Add egg and vanilla; beat well.
In a small bowl stir flour and baking powder together until well blended. Gradually add flour mixture to mixing bowl. Dough will be stiff.
Assemble and fill cookie press with dough; use desired disc. Press cookies on ungreased baking sheet.
Bake for 5-8 minutes or until golden brown around edges.