Cream butter real well with beater. Add icing sugar in 3 parts beating very well after each addition. Add corn starch in 3 parts beating well again. Add flour gradually beating well. Flour counter - break off small pieces and pat and cut with cutter dipped in flour. ( round cutter about 2" to 2-1/2" diameter)

Bake at 300 degrees - maybe 20 min. Bake just until bottoms are slightly brown, cookies should be white on top.