Chocolate Chip Coffee Cake

Cake:
1 cup butter
1 cup sugar
2 eggs
1 cup sour cream
1 teaspoon baking powder
1 teaspoon salt
1 teaspoon baking soda
2 teaspoons vanilla
2 cups flour

Topping:
1/4 cup sugar
1/3 cup firmly packed brown sugar
1 teaspoon cinnamon
1 cup chopped pecans or walnuts
1 6 ounce package chocolate chips

In a large bowl cream butter and sugar together until smooth. Add eggs, sour cream, baking powder, salt, soda, vanilla. Gradually add flour and mix well. Preheat oven to 350 degrees.
Mix topping ingredients together in a small bowl. Sprinkle a greased tube pan with 1/4 of the topping. Alternate layers of topping and batter. There should be 4 layers of topping and 3 layers of batter. Bake for 45-60 minutes or until knife comes out clean.