Preheat your oven to 400°F (200°C, or gas mark 6).
Combine all the dry ingredients into a bowl and blend well.
Add all the wet ingredients to the dry mix and blend well.
Add the blueberries and gently blend them in to the batter just to distribute them evenly.
Add the batter to paper cupcake liners in a muffin tin and bake for 20 minutes, or until the tops are browned and a toothpick placed in the center of a muffin comes out clean.