Step 1

In a large bowl, whisk together flour, baking powder, salt, and cinnamon.

Step 2

In a separate bowl, whisk together sugar, melted butter, yogurt, eggs and vanilla until well combined.

Step 3

Mix flour mixture into wet mixture until thoroughly combined and no lumps remain, about 1 minute.

Step 4

Gently fold in apples until evenly distributed.

Step 5

Cover the bowl with plastic wrap and let batter rest at room temperature for 15-20 minutes. Do not rest for more than 30 minutes or the muffins will be dense.

Step 6

Meanwhile, preheat oven to 375 degrees and spray a 12 cup muffin tin with canola oil spray or line with paper muffin cups.

Step 7

While batter rests, combine Cinnamon Sugar Topping ingredients in a small bowl and set aside.

Step 8

Using an ice cream scoop or large spoon, portion batter evenly into prepared muffin tins.

Step 9

Top muffins with cinnamon sugar topping.

Step 10

Bake 25 minutes*, or until the muffins are golden and toothpick inserted in the center comes out clean. *TIP: Check at 20 minutes. If you feel that the tops are browning but want a few more minutes baking the center, gently cover with foil and bake another 5-10 minutes

Step 11

Let muffins cool in muffin tin for 10 minutes. Remove from tins and let cool on wire rack at least another 10 minutes.