Mom'S Thumb Cookies - cooking recipe

Ingredients

3/4 c. butter
1/2 c. sugar
1 egg yolk, beaten
1 1/2 c. flour

Preparation

Mix together butter, sugar and egg yolk; knead in flour. Chill for at least 2 hours.
Take 1 teaspoon of mixture and roll into a ball.
Press center with thumb and fill with thick preserves of your choice (strawberry, apricot, etc.).
Bake at 350\u00b0 for 10 to 15 minutes.