Coffee Cake

Source: Mrs. Watson @ Lakeside
adapted by http://theresalwaysthyme.blogspot.com

Topping:
1 cup sugar
5 tablespoons chopped walnuts
2 tablespoons cinnamon
2 tablespoons sweetened shredded coconut

Cake:
3 cups flour
2 teaspoons baking soda
1/4 teaspoon salt
1 cup butter (unsalted)
2 cups sugar
4 eggs, room temperature
2 cups sour cream
2 teaspoons vanilla

For topping: Combine all ingredients and set aside.

For cake: Preheat oven to 350 degrees. Butter 9 X 13" pan. Sift flour, baking soda and salt into medium bowl. Cream butter with sugar in large bowl until light and fluffy. Beat in eggs one at a time. Beat in sour cream and vanilla. Mix in dry ingredients until just blended. Spoon into prepared pan. Sprinkle with topping. Swirl knife through topping and batter. Bake until tester comes out clean, 45-50 minutes.