4 1/2 c. sifted flour
1 tsp. baking soda
1 tsp. cream of tartar
1 c. butter
1 c. oil
1 c. sugar
1 c. confectioners' sugar
2 eggs
1 tsp. vanilla
1 c. chopped walnuts (optional)

Preheat the oven to 375 degrees. Sift together flour, baking powder, cream of tartar. Set aside. Cream butter, oil, and sugars in a bowl until light and fluffy. Add eggs and vanilla. Slowly mix in dry ingredients. Drop dough by teaspoon on oiled cookie sheet. Flatten each cookie with a greased bottom of a drinking glass dipped in sugar. Bake for 10 minutes or until lightly brown around edges.