Preheat the oven to 180°C.
Mix all the ingredients in a large mixing bowl, being careful not to overmix the mixture. Pour the batter into greased muffin trays, only filling half way.
Bake in the oven for 20 - 25 minutes. Insert a skewer into a muffin and if it comes out clean, they are ready.
Makes 24 small muffins or 12 large breakfast muffins.