Chocolate Chip Zucchini Muffins

From allrecipes.com

Ingredients:

1 1/2 cups all-purpose flour

3/4 cup white sugar
1 teaspoon baking soda
1 teaspoon ground cinnamon
1/2 teaspoon salt
1 egg, lightly beaten
1/2 cup vegetable oil
1/4 cup milk
1 tablespoon lemon juice
1 teaspoon vanilla extract
1 cup shredded zucchini
1/2 cup miniature semisweet chocolate chips
1/2 cup chopped walnuts
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Directions:

1. Preheat oven to 350 degrees F (175 degrees C). Grease 12 muffin cups, or line with paper muffin liners.
2. Combine flour, sugar, baking soda, cinnamon, and salt in a large bowl. Mix egg, oil, milk, lemon juice, and vanilla extract in a bowl; stir into dry ingredients until just moistened. Fold in zucchini, chocolate chips, and walnuts. Fill prepared muffin cups 2/3 full.
3. Bake in preheated oven until a toothpick inserted into the center of a muffin comes out clean, 20 to 25 minutes.