Preheat oven to 350 degrees.
Mix the chia seed with water and set aside to let it gel.
Fill muffin tin with liners
In a large bowl, whisk together flour, sugar, baking powder, baking soda, salt and cinnamon
Add raisins to a small bowl and sprinkle with about ½ teaspoon of flour mixture. This will help them from sinking to the bottom.
In a small bowl, mix together the prepared chia seed mixture and oil.
Add the oil mixture to dry ingredients and blend just until combined.
Stir in zucchini and raisins, if using raisins. Don't overbeat.
Bake at 350° F for 12-15 minutes or until a toothpick inserted in a middle comes out clean.
Remove from oven and cool on a wire rack.