4 c. brown sugar, packed
1 tbsp. cream of tartar
1 c. butter
4 eggs
1/2 tsp. salt
7 c. flour
1 tbsp. baking soda
2 tsp. vanilla

Cream together butter, brown sugar and eggs. Add cream of tartar, then flour. Dough will be stiff. Make in 4 to six rolls in waxed paper. Refrigerate overnight; slice in 3/8-inch slices.

Bake for 10 to 12 minutes; do not overbake.