For zucchini muffins, make the batter using the zucchini bread recipe below. Rather than using a loaf pan, fill each well of a standard sized muffin tin (greased well!) 2/3 full. Bake at 350 degrees Fahrenheit for 20-25 minutes. Whether you make zucchini bread or muffins, test for doneness. When a wooden toothpick or cake tester inserted in the center comes out clean, they’re finished baking.