Directions

• Preheat oven to 300 degrees.
• Cream butter, shortening and sugar. Add the baking soda, cream of tartar, and salt till combined.
• Beat in egg yolks along with the vanilla.
• Mix in the flour.
• Shape dough into 1 inch balls. Roll in nonpareils if desired.
• Place 2 inches apart on ungreased sheets.
• Bake for 20 minutes per pan or until tops are cracked & sides are set. (Do not let edges brown).