Preheat oven to 180 degrees. Line a 12 muffin pan and set aside.
Melt the butter. Whisk in the eggs till well incorporated. Add the yogurts and whisk well. Fold in the grated zucchini.
Sift the dry ingredients (flours, cinnamon, baking powder-soda and salt), over the wet ingredients.
Fold in the mixture. Add the remaining ingredients and fold till all moist and done. Don't overmix.
Divide equally into the muffin cups. Bake for 25-30 minutes till skewer comes out clean.
Allow to cool on a rack and enjoy with a cup of coffee or milk!