2 c. flour
1/2 tsp. baking soda
1/2 tsp. cream of tartar
1/4 tsp. salt
1/4 lb. butter
1/2 tsp. vanilla
1 c. light brown sugar, firmly packed
1 egg
1 c. pecans (halves or pieces)

Cream butter, sugar, and vanilla. Add egg, beat well. Gradually add dry ingredients. Mix in pecans. Shape into long rectangle. Place it lengthwise on a piece of wax paper to form roll 12 to 14 inches long by 2 inches in diameter. Freeze or refrigerate overnight. Dough must be solid. Cut thin slices 1/8 to 1/4 inches thick. Bake 8 to 10 minutes at 375 degrees to golden brown.