In a bowl, combine the dry ingredients. In another bowl, mix the wet ingredients. Add the wet ingredients to the dry ones and mix well.
Preheat the oven to 180ÂșC.
Pour the batter into a greased muffin tins and bake for 35 minutes.
If you'd like to add walnuts on top, open the oven after 20 minutes and sprinkle the walnuts over the batter.