Preheat oven to 350 degrees F and prepare a muffin pan with non stick spray
In a medium bowl, combine the flour, baking soda, cinnamon, ginger and salt
Using a stand mixer with paddle attachment, cream the butter and sugar together until light and fluffy
Add in one egg at a time and mix until incorporated
Add the diced apples into the flour mixture and mix until apples are coated
With the mixer on low speed, alternate the flour mixture and the buttermilk until all ingredients are combined
Fill the muffin pan ¾ full
Sprinkle the top of each muffin batter with Cinnamon Sugar topping
Bake for 18-20 minutes or until toothpick comes out clean
Remove from the oven and allow the muffins to cool before removing from the pan
Enjoy!