Preheat the oven to 375 F. Line a muffin tin with liners.
Add the cornmeal, flour, sugar, baking soda and salt to a bowl. Whisk to combine.
Add the milk, canola oil and apple cider vinegar. Mix with a spatula to combine. Fold in the zucchini until even dispersed. Fill each muffin liner with ¼ cup batter. Bake for 26-28 minutes until the muffins are golden on top and a toothpick inserted comes out clean.
Let cool completely.
Notes
OIL FREE: Omit the oil and use ¼ cup unsweetened applesauce in its place.