
These apple crumble muffins are made with moist cinnamon muffin batter, filled with chopped apples, topped with a buttery crumble, and topped with a delicious glaze.
Preheat an oven to 180c (350f) and prep a 12-cup muffin pan with paper liners.
Into a big mixing bowl, add the melted butter, sugar, brown sugar, yogurt, milk, cinnamon, eggs, vanilla extract, and kosher salt. Mix with a whisk until the mixture is well combined.
Add the flour, baking soda, and baking powder, and mix until almost combined.
Add the peeled, and chopped chunks of apples, and mix until just combined.
Pour the batter into the muffin tins filling almost to the top.
Into a medium mixing bowl, add the flour, sugar, cinnamon, and melted butter. Mix with a spoon until the mixture is well combined.
Into a small mixing bowl, add the powder sugar, milk, and vanilla. Mix with a spoon until the mixture is well combined and until the glaze is smooth and silky.