Apple Cinnamon Yogurt Cake

This original recipe came from a very cute blob,  Buttercream Blondie.  I made a change or two and here is my twist on the recipe.  It is a wonderful fall cake.

Topping:

• 1 cup  flour
• 1/4 cup sugar
• 1/3 cup dark brown sugar
• 1 and 1/4 tsp. teaspoons ground cinnamon
• pinch freshly grated nutmeg
• 1/4 tsp. salt
• 7 Tablespoons unsalted butter-melted 
• 1/2 c. chopped nuts
 Cake
•  1/2 c. + 2 T.  unsalted butter
• 3/4 cup sugar
• 1/4 cup light brown sugar
• 2 eggs
• 1 tsp. vanilla extract
• 8 ounces vanilla yogurt
• 1 and 1/2 cups flour
• 1 tsp. ground cinnamon
• 1/2 tsp. ground cloves
• 1/4 tsp. fresh grated nutmeg
• 1&1/4 tsp. baking powder
• 1/4 tsp. baking soda
• 1/2 tsp. salt
• 1 cup diced  apple 

Beat butter and sugars till creamed well.  Add eggs-beat well.  Add vanilla .  Beat just until well mixed.  Mix all dry ingredients together.  Now beat in 1/2 the yogurt mixture, then 1/2 the dry ingredients.  Repeat.  Mix in apple.  Spray a 8 x 8 pan and then also place parchment paper in the pan.  Give that a little spray too  Put batter into pan.
Combine all topping ingredients and sprinkle all over the top of the batter.  Bake for one hour at 350.