Preheat the oven to 180ºC/350ºF/Gas4. Line a 12 hole muffin tin with muffin cases and set to one side.
Add the Stork or butter and sugar into a mixing bowl or stand mixer, and beat them together until they’re light and fluffy.
In a separate bowl or jug, crack the eggs and whisk gently. Add the eggs to the Stork and sugar, and mix well.
Peel, core and grate the apples. Add the grated apple to the mixture and incorporate well.
Add the flour and cinnamon. Mix until only just combined – be careful not to overmix.
Using an ice cream scoop or spoon, carefully divide the mixture between the 12 muffin wrappers. They should be filled around 3/4 full.
Bake for 15-18 minutes, or until the muffins are baked. They'll be golden brown on top and firm to touch.
Allow to cool, and enjoy!