Preheat the oven to 350°F (180°C). Grease a 12-cup muffin tin with butter.
Make the muffin batter: In a large bowl, combine the flour, apple, brown sugar, cinnamon, salt, baking soda, vanilla, egg, applesauce, plain yogurt, and apple juice. Whisk until well combined.
Make the topping: In a medium bowl, combine the flour, brown sugar, butter, oats, and cinnamon. Mix with a fork until crumbly.
Divide the muffin batter between the cups of the muffin tin. Top each muffin with 1 tablespoon of the crumble topping.
Bake for 30 minutes, or until a toothpick comes out clean when inserted in the center of a muffin.
Make the glaze: In a medium bowl, combine the powdered sugar, lemon zest, and lemon juice. Whisk until smooth.
Drizzle the lemon glaze on top of the muffins.
Enjoy!
Recipe by Cooking TV Recipes at https://cookingtv-channel.com/apple-pie-muffins/