For the crust, toss the flour, sugar, salt together. Grate the chilled butter with a cheese grater and toss into the flour mixture. Add in the buttermilk and mix together until it starts to barely come together. Add more buttermilk if needed. The mixture should be dry but will stick together when you squeeze together a handful.

Form into a disk and cover with plastic wrap. Set in the fridge for 30 minutes before rolling out and forming onto a pie plate. Place pie crust back in the fridge to chill until the filling is ready

Preaheat the oven to 400 degrees

For the filling, peel and cube apples and place into a large skilled. Cook the apples down for about 5-7 minutes over medium heat. Take off the heat and add in the flour, sugar, cinnamon, nutmeg and frozen cramberries. Mixt together and pour into the prepared pie crust.

For the topping, toss all ingredients together and place ontop of the prepared pie.

Bake in the oven for 50-55 minutes. let cool at leaste 2 hours before serving.