Ingredients
3 1/2 cups flour
3/4 teaspoon soda
1 teaspoon salt
1 cup butter
1 egg
1 1/3 teaspoon vanilla
1 1/4 cup sugar
3 tablespoons white vinegar
Method
Sift soda, flour, and salt.
Cream butter, egg, and sugar. Add half dry ingredients and mix. Add vinegar and vanilla and blend. Add remaining dry ingredients and mix well. Divide into three parts on wax paper and roll into 2-inch diameter and chill overnight. Slice 1/8-inch thick. Bake on sheet 8 to 10 minutes at 375-degrees.