Zucchini Chocolate Chip Muffins

This recipe is from allrecipes.com.

1 1/2 cups all-purpose flour
3/4 cup 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
1/4 cup miniature semisweet chocolate chips
1/4 cup chopped walnuts (I did not use walnuts)

In a bowl, combine flour, sugar, baking soda, cinnamon and salt. Combine the egg, oil, milk, lemon juice and vanilla; mix well. Stir into dry ingredients just until moistened. Fold in zucchini, chocolate chips and walnuts. Fill greased or paper-lined muffin cups two-thirds full. Bake at 350 degrees F for 20-25 minutes or until muffins test done.