BEAT margarine at medium speed of electric mixer until light and fluffy; beat in jelly powder. Mix in egg. Stir in flour and baking powder.
SHAPE dough as illustrated; chill 2 hours.
CUT and bake at 350°F for 8-10 min.; cool.
GLAZE: MIX 2 cups icing sugar and 3 Tbsp water until smooth. Blend in 3 to 4 drops food colouring to tint to desired colour. Dip edges of cookies in frosting and dry on rack.