1/3 Cup brown sugar
1 Teaspoon ground cinnamon
1 Stick Unsalted butter (softened)
2/3 Cup granulated sugar
2 eggs
2 Teaspoons vanilla extract
1-1/2 Cups all purpose flour
2 Teaspoons baking powder
3/4 Cup Buttermilk - full fat ((or substitute for 1/2 milk))
2 Cups apples - peeled, cored, and chopper
1 Tsp ground cinnamon
1 Tbsp granulated sugar
1/2 Cup powdered sugar
1 Tbsp milk