Preheat the oven to 400 degrees F. Grease or line the muffin tins with paper liners.
In a large bowl combine the flour, sugar, baking powder, baking soda, salt, cinnamon, and pecans.
In a medium bowl beat the egg. Add the oil, milk, zucchini, and vanilla and mix to combine.
Add the wet ingredients to the dry ingredients and mix just until combined.
Fill the prepared muffin cups about 3/4 full. Place in the preheated oven and bake for 13 to 15 minutes or until a wooden pick inserted in the center comes out clean or a few moist crumbs
Cool the muffins in the tins for about 5 minutes before removing them to a wire rack to cool.