Crush cereal and measure.
Sift flour once, measure, add baking powder and salt, and sift again.
Cream shortening and add sugar gradually, creaming thoroughly.
Add eggs and vanilla; beat well.
Add cereal and blend well.
Add flour mixture gradually, mixing well after each addition.
Chill dough until firm.
Roll 1/8 inch thick on lightly floured board and cut with floured shamrock, hat, and pipe cooky cutters.
Or use 1 1/2-inch round cooky cutter and arrange three cookies to make a shamrock.
Use strip of green gumdrop for stem.
Or make patterns from cardboard, place on dough, and cut out with knife.
Bake on ungreased baking sheet in hot oven (400° F.) 7 to 8 minutes, or until done.