Sour Cream Coffee Cake

This is a Christmas Morning Dorff Family Tradition passed down from my mother's side of the family. Over the years the actual recipes got lost. This is not the original recipe, but we figured it was more the tradition of having the coffee cake than having the exact recipe. This recipe is one I got from Irene at allrecipes.com.

Ingredients:

1 c white sugar
1 c butter, softened
3 eggs
2 c all-purpose flour
1 1/2 tsp. baking powder
1 1/2 tsp. baking soda
1/2 c sour cream
1 c walnuts, chopped
3/4 c white sugar
2 tsp. ground cinnamon

Directions:

1. Preheat oven to 350 degrees F (175 degrees C). Lightly grease one 8x12 inch pan.
2. In a large bowl, cream together 1 cup of the white sugar with 1 cup butter. Add the eggs and beat well. Mix in the flour, baking soda, baking powder, and sour cream, stir until just combined.
3. Pour 1/2 of the batter into the prepared pan then sprinkle with 3/4 of the filling. Pour the remaining cake batter on top and sprinkle top with the remaining filling. Bake at 350 degrees F (175 degrees C) for 40 minutes.
4. To Make Filling: Combine chopped nuts, ground cinnamon, and 3/4 cup white sugar and mix well.

*Note: I cook this in a bundt pan, and it turns out just great!*