Recipe Aunt Lillian's Crumb Cake

Ingredients
1/2 cup butter, softened
1 cup sugar
2 eggs
1 cup sour cream
1 teaspoon vanilla extract
1 1/2 cups all-purpose flour
1 teaspoon baking soda
1/4 teaspoon salt
TOPPING:
1/2 cup sugar
1/4 cup chopped walnuts
2 tablespoons flaked coconut
2 teaspoons ground cinnamon

Directions
In a mixing bowl, cream the butter and sugar. Add eggs, one at a time, beating well after each addition. Add the sour cream and vanilla; mix well. Combine flour, baking soda and salt; add to the creamed mixture and mix well. Spread half into a greased 9-in. square baking pan.
Combine topping ingredients; sprinkle half over batter. Carefully spread remaining batter on top; sprinkle with remaining topping. Gently swirl topping through batter with a knife. Bake at 350 degrees F for 35-40 minutes or until a toothpick inserted near the center comes out clean. Cool.