Instructions: Cream butter, add sugar gradually and cream until light. Add egg yolk and blend well. Crush cubes of ammonia and sift with flour. Add enough flour to make a stiff dough. The dough should crack when thumb is pressed in. Roll in balls and push in center with thumb. Bake in a slow oven (250 degrees)

for 30 minutes.

Yield: 30 1 1/2 inch balls.

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