Apple Coffee Cake-Doesnt get much better!!

This recipe is different than any other coffee cake recipes I have had. Instead of using white sugar you use brown sugar and I think that make all the difference. It is so rich and moist!! I bake this when I make breakfast burritos for church and this thing disapears quick!!! Hope you enjoy!!

Cake:

1 stick plus 2 teaspoons unsalted butter
1 1/2 cups packed light brown sugar
2 large eggs 2 cups all purpose flour
1 teaspoon baking soda
1 teaspoon ground cinnamon
1/2 teaspoon salt
1 cup sour cream (you can substitute yogurt for half or all of this cause I have done it!!)
1 teaspoon pure vanilla extract
2 cups peeled, cored and chopped apples (pampered chefs apple, peeler, corer helps save time on this!!)

Crumble Topping:

1/2 cup packed light brown sugar
1/2 cup all purpose flour
1/2 teaspoon ground cinnamon
4 tablespoons unsalted butter, softened

Brown Sugar Glaze:

1/2 cup packed light brown sugar
1/2 teaspoon vanilla extract
2 tablespoons water

Preheat the oven to 350 degrees F. Lightly grease a 13 by 9-inch glass baking dish with 2 teaspoons of the butter. In a large bowl, cream together the remaining stick of butter and sugar until light and fluffy. Add the eggs 1 at a time, beating after the addition of each. In a separate bowl or on a piece of parchment, sift together the flour, baking soda, cinnamon, and salt. Add to the wet ingredients, alternating with the sour cream and vanilla. Fold in the apples. Pour into the prepared baking dish, spreading out to the edges. To make the topping, in a bowl, combine the sugar, flour, cinnamon, and butter, and mix until it resembles coarse crumbs. Sprinkle the topping over the cake and bake until golden brown and set, 35 to 40 minutes. Remove from the oven and let cool on a wire rack for at least 10 minutes. To make the glaze, in a bowl, combine the sugar, vanilla, and water and mix until smooth. Drizzle the cake with the glaze and let harden slightly. Serve warm.