Pre-heat oven to 350 degrees F (175 degrees C).
Spray a 10-inch pie pan or 9 inch deep pie pan and set aside. You may alternatively use butter to oil the pan.
Next Add butter and sugar in a sauce pan, let it melt then add apples, lemon juice, cinnamon, nutmeg, vanilla and cornstarch stir until combined .
Reduce heat and let it cook for about 7 minutes , apples should be firm but tender . Remove from stove and let it cool.
While it cools , mix the dry ingredients: flour, sugar, salt ,baking powder and soda in a large bowl.
Add butter a into flour mixture and mix with hands until the mixture resembles coarse crumbs.
Gently stir in buttermilk into dry ingredients until all is moistened. Don’t overwork the dough.
Pour the apple pie filling into the pan
Then add the dough over the apple pie filling in the pan. Sprinkle with crystalized or brown sugar.
Place cobbler on a baking sheet, just in case you have some drippings from the pie.
Bake at 350 degrees for about 40 -45 minutes or until the topping is cooked through and the filling is bubbly. Remove and let it cool down for serving.
Serve with vanilla ice cream.