Zucchini Muffins

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