This recipe works for muffins (makes 18), a 13×9 pan (which is what I used here) or a 9×9 pan. See cooking times below.
Author:Charity
Ingredients
Scale
1½ cups grated zucchini (about 2 medium zucchini)
2 eggs
1/3 cup plain yogurt
1/3 cup canola oil
3/4 cup sugar
2 teaspoons vanilla extract
1 1/2 cups whole wheat flour
1/2 cup unsweetened cocoa powder
1 teaspoon cinnamon
1 teaspoon baking soda
1/2 teaspoon salt
Instructions
Preheat oven to 350 degrees F. Prepare pan with butter, cupcake liners (if using muffin pan) or spray oil.
Put shredded zucchini into a large section of paper towel and squeeze over the sink to release excess water. Set aside.
In a large mixing bowl, beat eggs until frothy. Add yogurt, oil, sugar and vanilla then beat again. Then add dry ingredients plus zucchini. Mix until just combined. Pour into pan.
EDITED: Cooking times: cake: 9×9 = 30-35 minutes, cake: 13×9 = 40-45 minutes mini-cupcakes/muffins: 10 minutes, regular cupcakes/muffins = 12 minutes. *Use a toothpick in center to test doneness, which will vary according to ovens and exact amount of zucchini you put in.