Preheat the oven to 175°c
Beat the butter and sugar together until light and fluffy.
Add an egg, followed by ¼ of the flour and cinnamon and mix well.
Repeat until all the egg, flour and cinnamon is mixed in.
Mix in the maple syrup
Mix in the grated apple.
Spoon the mixture into cake cases, I found that it filled 18 cupcake cases, each about ⅔ full.
Bake for 20 mins, or until a cocktail stick comes out clean.
Leave to cool, while you make the frosting.