Soft Snickerdoodle Cookies

1/2 cup butter
1 1/2 cup sugar
2 eggs
2 3/4 cup flour
2 tsp cream of tartar
1 tsp baking soda
1/4 tsp salt

3 Tbs sugar
3 tsp cinnamon

Combine butter, sugar and eggs; mix well. Add dry ingredients. Chill dough for 10-15. Combine 3 Tbs sugar and 3 tsp cinnamon in bowl. Roll dough into balls and coat in sugar/cinnamon mixture. Bake at 350 degrees for 10 minutes.
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