Eggnog Thumbprints

In a medium bowl, cream sugar, butter, vanilla and egg yolks until light and fluffy. Lightly spoon flour into measuring cup, level off. Gradually add the flour and baking powder to creamed mixture, mix well. Refrigerate 30 minutes.

Filling: In small saucepan, mix sugar, flour and almond flavoring. Gradually add eggnog and cook over low heat until smooth and thickened, stirring constantly. In small bowl, blend 2 T. hot mixture into slightly beaten egg yolk. Return to saucepan, blend well. Cook just until mixture bubbles, stirring constantly. Cool.

Preheat oven to 350F. Shape dough into 1" balls. Place 2" apart on ungreased baking sheet. With thumb, make imprint in center of each cookie, and fill with 1/2 tsp. filling. Bake for 11-14 minutes, or until light golden brown around edges. Store in refrigerator.