preheat oven to 200 degrees C
Mix the flour, baking powder and add all other ingredients.
Mix vigorously with a spoon until it becomes homogeneous, but do not mix too.
fill the boxes had already prepared muffin until 3 / 4 height
Bake at 200 degrees during the first 5 minutes, then reduce temperature to 170 degrees and bake for about 25 minutes.