Apple Coffee Cake with Crumble Topping and Brown Sugar Glaze

INGREDIENTS

• 1/2 cup packed light brown sugar
• 1/2 teaspoon vanilla extract
• 1 teaspoon ground cinnamon
• 2 large eggs
• 1/2 teaspoon salt
• 1 stick plus 2 teaspoons unsalted butter
• 1/2 teaspoon ground cinnamon
• 4 tablespoons unsalted butter, softened
• 2 cups all purpose flour
• 1/2 cup all purpose flour
• 2 cups peeled, cored and chopped apples
• 1 teaspoon baking soda
• 1 1/2 cups packed light brown sugar
• 1 teaspoon pure vanilla extract
• 1 cup sour cream
• 2 tablespoons water