Preheat oven to 375°F and line 12 muffin cups with liners, or lightly spray with cooking spray.
Whisk dry ingredients in a medium bowl, set aside.
Using a mixer, beat oil, yogurt, and sugar on high until combined. Beat in eggs and vanilla until combined. With mixer on low, alternate adding flour mixture and milk (about half of each at a time). Fold in chopped apples.
Divide into prepared muffin cups and sprinkle tops with turbinado sugar. Bake for 20-25 minutes.
If desired, replace butter flavored olive oil with melted butter, vegetable or canola oil.
Any type of apple will work. I like apples that stay firm when cooked.
Batter can be mixed by hand if you don't want to get your mixer out.
Substitute all-purpose flour for whole wheat, or a combination, if you prefer.