1. Melt the butter, stir in the sugar, then beat in the egg. Mash the banana together with the fromage frais & cinnamon, then stir it in to the buttery mixture.
2. Sift in the flour, baking powder & bicarbonate of soda, mix until combined, adding a little dash of milk if it's a bit dry.
3. Line a 12 hole bun tin with paper cases & spoon in the mixture. A batch should make 18 cupcakes. Bake them in the oven at 190c/GM5 for 10-12 minutes until golden brown & well risen, lift out & leave to cool completely
4. To make the frosting, cream together the butter & icing sugar, adding a few drops of vanilla & a little dash of milk to help it along. Top the cupcakes with the frosting, I added a banana chip to the top for decoration.