From Land O’Lakes which offers recipes that never disappoint me.   Slightly altered the following to add shredded coconut to cobbler toppings and it smells really good when it baking.  This recipe is not too sweet too.  Very good a soup bowl full coffee in the morning.
Topping Ingredients:
1 cup firmly packed brown sugar
1 cup all-purpose flour
1/2 cup quick-cooking oats
1/2 cup LAND O LAKES® Butter, softened
Coffee Cake Ingredients:
1 cup sugar
1 cup LAND O LAKES® Butter, softened
2 eggs, slightly beaten
1 1/4 cups LAND O LAKES® Sour Cream
1 tablespoon vanilla
3 cups all-purpose flour
1 teaspoon baking powder
1 teaspoon baking soda
1/2 teaspoon salt