1 cup butter or shortening (shortening gives a better texture)
1½ cups sugar
3 eggs
¼ cup sour cream
2 cups flour
1 tsp baking soda
1 tsp cream of tartar
1 tsp baking powder
½ teaspoon salt
⅓ cup sugar
1 Tbsp cinnamon
Cream shortening and sugar.
Add eggs, one at a time, scraping down the bowl between eggs.
Mix in sour cream.
Combine flour, baking soda, cream of tartar, baking powder and salt.
Mix into shortening/sugar mixture.
In a separate, small bowl, combine ⅓ cup sugar and cinnamon.
Sprinkle half the cinnamon sugar mix into a 9X13 pan.
Spread batter on top.
Top with remaining sugar mixture.
Bake 350 degrees for 25-30 minutes.
You don't want this too much like cake, so opt for less time if you need to.