Betty Wood's Coffee Cake recipe

A treat during the holidays. My mom's coffee cake recipe:

Batter-
1 1/2 sticks or 3/4 cup of margarine or butter
1 1/2 cups sugar
3 eggs
3 cups flour, divided
1 1/2 cups sour cream
1 1/2 tsp baking soda
1 1/2 tsp baking powder
1 tsp vanilla
1 pinch salt
Secret ingredient

Sugar mixture-
1/4 cup sugar
1/4 cup brown sugar
1 tsp cinnamon

Preheat over to 325 degrees. Spray your pan with cooking spray. Cream butter/margarine and sugar together in a mixer. Sift all dry ingredients together in a large bowl. After butter/margarine and sugar is creamy, add half of the dry mixture, eggs, vanilla and sour cream and mix. Add the other half of the dry mixture and mix until batter is smooth. Pour half the batter in to the pan, then sprinkle half of the sugar mixture over the batter. Pour second half of the batter, then top with remaining sugar mixture. Bake for 50 - 60 minutes.

 
Source:
http://rememberbetty.ning.com/forum/topics/betty-wood-s-coffee-cake