Chocolate Chip Zucchini Muffins

Chocolate chip-zucchini muffins

1 1/2 C. all purpose flour (I used 1/2 C. whole wheat flour and 1 C. all purpose flour)
3/4 C. sugar
1 teaspoon baking soda
1 teaspoon ground cinnamon
1/2 teaspoon salt
1 egg, lightly beaten
1/2 C. vegetable oil
1/4 C. milk
1 Tablespoon lemon juice
1 teaspoon vanilla extract
1 C. shredded zucchini
1/2 C. chocolate chips
1/4 C. chopped walnuts, optional

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.