Combine the cake flour, almonds, and sugar. Mix well.

Add vanilla, and cut in butter until the mixture resembles coarse oatmeal. Using hands form into a dough.

Chill covered in the fridge for at least 1/2 hour.

Remove from fridge and cut off pieces the size of a pecan and roll between palms to the width of a little finger. Don't let the ends taper. Bend into a crescent moon shape and place on baking sheet.

Bake at 350 for 12 - 15 minutes. Remove from baking sheet onto wire rack.

While still warm, roll in icing sugar. Chill for 24 hours.