Preheat Oven to 350 degrees
Cream butter and brown sugar with an electric handheld mixer.
Then add in the egg and mix well.
After that add in the baked and mashed sweet potato and mix well
Mix in the vanilla and milk
Add the gluten free flour, baking powder, baking soda, ginger to a bowl and mix well. Then using a spatula, fold this ginger flour mix into the wet ingredients.
Spoon mix into lined muffin pan and bake at 350 for 22-25 minutes.
Remove from oven and let cool.
Ginger Frosting
Add softened butter,and powdered sugar to bowl and using an electric handheld mixer, mix well. Then add in the milk, vanilla and ginger and mix until well incorporated.
When cupcakes have cooled, pipe frosting onto cupcakes and enjoy with chilled Beaujolais wine.