1 c. butter
1 1/2 c. powdered sugar
1 egg
1 tsp. vanilla
2 1/2 c. flour
1 tsp. cream of tartar
1/4 tsp. salt
1 c. chopped nuts

Cream butter and powdered sugar. Add egg and vanilla, beat. Add flour, cream of tartar and salt. Mix well. Add pecans. Chill for 1 hour. Roll into balls and bake at 400 degrees 8-10 minutes. Roll in powdered sugar while still hot.