Step 1: Spiced Rum Whoopie Pie Recipe.
Cream 110g butter with 180g caster sugar. Add two eggs, one at a time, and then add 75ml milk and 30ml rum. Mix well.
Add 1 tsp each of mixed spice and ground ginger, plus a pinch of salt and 250g gluten free self raising flour mix. That's right - they're gluten free, too!