Preheat oven to 400 degrees and grease muffin pan. In bowl of stand mixer, combine milk, butter, and egg. In a separate bowl, whisk together flour, sugar, baking powder, and salt. Slowly add flour mixture to wet ingredients in stand mixer. Stir until just blended, do not over-mix. Gently fold in apples, ⅔ cup of cheese, and bacon. Spoon batter evenly into prepared muffin tins. Top with remaining cheddar cheese. Bake for approximately 20 minutes, or until browned.
Recipe by My Wife's Muffin at http://www.mywifesmuffin.ca/2014/12/so-cheesy-apple-bacon-muffins.html