Right, well, I am going to give you a different recipe, slightly different to fairy cakes and they keep really well (there is a photo on my profile of some of these cupcakes - yes, I am sad!)
This is for "Cupcakes" - they make really lovely cakes with flat tops ready for the frosting. Makes 12.
120g plain flour
140g caster sugar
1.5 tspn baking powder
45g butter at room temp
120ml whole milk
1 large egg
1/4 tspn vanilla
Put flour, sugar, baking powder, pinch of salt and butter in bowl and, using a mixer, mix on low speed until you have sandy consistency. Add half the milk and mix.
Whisk the egg, vanilla & remaining milk for few secs then add to flour/butter mixture and mix till combined.
Divide between 12 cupcake cases and bake at 180/160fan/gas4 for 20-25 mins.