Place the orange quarters (make sure to remove and seeds) in the food processor and using the blade attachment, blitz until almost pureed. It is nice to see small pieces of orange peel in the final baking mix.
Add all the other ingredients. Pulse until smooth.
Divide into 24 cupcakes.
Bake at 180C/350F for 15-20 minutes. Test the centre with a clean fork or skewer to ensure they are cooked thoroughly.