Snickerdoodles

1/2 cup softened butter
3/4 cup sugar
1 egg
1 3/8 cups sifted flour (for high altitudes add 1/4 cup additional flour.)
1 tsp. cream of tartar
1/2 tsp. baking soda
1/4 tsp. salt
2 tbsp. sugar
2 tsp. cinnamon

Mix together:softened butter, sugar, and egg. Sift together: sifted flour, cream of tartar, baking soda, and salt. Mix and set aside: sugar, and cinnamon. Chill the dough for 1 hour in the refrigerator. Roll the dough into balls about the size of walnuts. Roll the balls in cinnamon and sugar mixture. Place the balls about 3 inches apart on ungreased cookie sheets. Bake at 400 degrees Fahrenheit until center is almost set and cookie appears lightly browned, 6 to 8 minutes. Cookies will puff up at first, then flatten out with a crinkled top.