Preheat the oven to 200C / 400F
Weigh your whole orange cutting-off pieces until you get to 200 grams. Cut the orange into 4 and put it into the bowl of your food processor with 1 cup of sugar. Blend until smoothish.
Add the egg, milk, raisins, pecan nuts, and melted butter and blitz until combined.
Add the flour, baking powder, and bicarb to the bowl and pulse briefly until combined. Remove the blade and scrape down the side of the bowl.
Using a spoon or ice cream scoop, divide the batter evenly between 12 muffins – preferably lined with paper liners. You can also spray your muffin tin lightly with cooking spray.
Bake for 20 – 22 minutes until springy to the touch and golden brown.