Preheat oven to 350° F.
Place 12 cupcake liners in a muffin tin.
Combine flour, salt, and baking powder in a bowl and set aside.
1 1/2 cups flour, 1/4 tsp salt, 1 tsp baking powder
Cream together the butter, sugar, and brown sugar.
1/4 cup sugar, 1/2 cup brown sugar, 6 Tbsp butter
Add egg one at a time and beat well after each addition.
2 eggs
Stir in the vanilla, and slowly stir in milk.
1 Tbsp vanilla, 1/2 cup milk
When combined, add the flour mixture and stir/fold to combine, making sure not to over-stir.
Fold in the chopped apples.
Spoon into cupcake liners and bake for 20-25 minutes or until toothpick comes out clean.