Preheat fanforced oven to 180C
Place butter and caster sugar into mixing bowl and mix 40 sec/speed 5.
Turn down to speed 1-2 and add one egg at a time, until combined - don't over mix.
Add flour and cider and mix 1-2 min/speed 5 (using spatula is needed).
Put mixture in liners and bake for 15 mins or until cupcakes are "springy" to touch.
Remove cupcakes and let cool.