Preheat your oven to 375° F
Grease (2) 6 or (1)12 cup muffin tin or line with liners
Dice two granny smith apples into cubes, add brown sugar and set aside.
In a medium bowl, combine flour, baking powder, baking soda, salt and cinnamon and set aside.
In a larger bowl, Combine the (melted) butter, eggs, and vanilla. Add the apple mixture and mix until smooth. Then, add in the dry ingredients and caramel chips.
In a small bowl, mix together brown sugar, flour, oats, and cinnamon. Then, cut in butter until topping is crumbly. Sprinkle over muffins.
Fill muffin tins about 2/3 of the way full and top with crumb mixture.
Bake at 375° for 18-20 minutes or until golden brown and a toothpick inserted in center comes out clean. Allow to cool for 3-5 minutes. Makes 12 muffins