1 c. butter, softened
1/2 c. sugar
2 egg yolks
1 tsp. vanilla
2 c. flour
1/4 tsp. salt

Cream butter, sugar until light and fluffy. Beat in egg yolks and vanilla until well mixed. Add flour and salt, beat at low speed until mixed, scraping bowl occasionally. Wrap up in foil, refrigerate, can be stored for future use.