Over the pond here we have imported your muffins and made them our own.  We use a normal cake mixture and use slightly larger bun cases than normal.

Heat the oven to 180 C, 350 F or gas mark 4

100 g or  4ozs Butter
100 g  or 4 ozs Caster Sugar
2 medium eggs
100g or 4 ozs Self Raising Flour.

Cream the butter and sugar together until light and fluffy, add the eggs one at a time with a small amount of flour to stop curdling then fold in the flour and put the mixture into muffin cases inside a bun tray.  Cook for 15 to 20 mins,. until firm on top.

When cold decorate with piped butter cream and tiny marshmallows or other decorations of your choice.

~JB