2. Pour the liquid mixture into the well and stir quickly and sparingly with a wooden spoon. The mix will look lumpy and may have the odd fleck of flour still visible, but don’t be tempted to over-mix. Tip in the blueberries and give it just one more stir. Divide the mix between the muffin cases – they will be quite full – then sprinkle the tops with the final tbsp of the oats and the rest of he sugar. Bake for 18-20 mins until risen and dark golden. Cool for 5 mins in the tray before lifting out onto a rack to cool completely.