Apple Cinnamon Crumb Muffins

Instructions

1. Preheat oven to 425°F (218°C). Spray a 12-count muffin pan with nonstick spray or line with cupcake liners. You may need a 2nd pan as this recipe makes up to 14 muffins, though you can always bake in batches using 1 pan. Set aside. *See note about jumbo size & mini muffins.*
2. Make the crumb topping: Mix the brown sugar, granulated sugar, and cinnamon together in a medium bowl. Stir in the melted butter, and then gently mix in the flour using a fork. Keep the mixture as large crumbles and do not over-mix. If over-mixed, this will turn into a thick paste. Set topping aside.
3. Whisk the flour, baking soda, baking powder, cinnamon, and salt together in a large bowl. Set aside.
4. Make the muffins: Using a handheld or stand mixer fitted with a paddle attachment, beat the butter and both sugars together on high speed until smooth and creamy, about 2 minutes. Scrape down the sides and bottom of the bowl as needed. Add the eggs, yogurt, and vanilla extract. Beat on medium speed for 1 minute, then turn up to high speed until the mixture is combined and mostly creamy. (It’s ok if it appears somewhat curdled.) Scrape down the sides and bottom of the bowl as needed. With the mixer running on low speed, add the dry ingredients and milk into the wet ingredients and beat until no flour pockets remain. Fold in the apples.
5. Spoon the batter evenly into each cup or liner, filling each all the way to the top. Spoon crumb topping on each, gently pressing it down so it sticks.
6. Bake for 5 minutes at 425 then, keeping the muffins in the oven, reduce the oven temperature to 350°F (177°C). Bake for an additional 15-18 minutes or until a toothpick inserted in the center comes out clean. The total time these muffins take in the oven is about 20-23 minutes, give or take. Allow the muffins to cool for 5 minutes in the muffin pan, then transfer to a wire rack to continue cooling.
7. Make the icing: Whisk all of the icing ingredients together and drizzle over warm or cooled muffins.
8. Iced or plain muffins stay fresh covered at room temperature for a few days or in the refrigerator for up to 1 week.

Notes

1. Freezing Instructions: Freeze baked & cooled muffins for up to 3 months. It’s best to freeze the muffins without the icing and add the icing after thawing and before serving. (Freezing them with the icing on is completely fine, but the muffins taste better with fresh icing.) Thaw muffins in the refrigerator or at room temperature before icing/serving.
2. Yogurt or Sour Cream: You can use either regular or Greek plain yogurt in this recipe (any fat content) or sour cream. The same amount of unsweetened applesauce or mashed banana may also be used if needed.
3. Milk: You can use any milk, dairy or nondairy.
4. For a jumbo muffin pan: 425°F for 5 minutes, then reduce to 350°F for 22-25 minutes for a total of 27-30. Makes about 6. For mini muffins: 350°F for 12-14 minutes. Makes about 36-40.
5. Quick Bread: Here is apple cinnamon bread, which is close to the same recipe and baked in a loaf pan.
6. Why is everything at room temperature? All refrigerated items should be at room temperature so the batter mixes together easily and evenly. Read here for more information.