1/2 c. or 1 stick unsalted butter
1/2 c. or less white sugar
1 egg yolk unbeaten or 1 egg
1 tsp. vanilla or almond
1/4 tsp. lemon extract
1 c. flour
Jam or jelly

Cream butter, sugar, lemon and vanilla extract. Beat egg yolk or egg into the mixture thoroughly. Put flour in all at once. Stir to thick dough. Shape dough into small balls using 1 teaspoon for each. Put on ungreased cookie sheet. Make a dent in each with floured thumb. Place a small amount of jam in each dent. Bake about 15 minutes at 400 degrees.