Zucchini Muffins

Bahan-bahan (12 porsi)

• 1 cup all-purpose flour
• 1 teaspoon cinnamon
• ¾ teaspoon baking soda
• ½ teaspoon salt
• ½ cup granulated sugar
• 1 large egg (room temperature)
• ⅓ cup vegetable oil
• 3 tablespoons milk
• 1 teaspoon vanilla extract
• 1 cup shredded zucchini
• ½ cup chopped walnuts (optional)
• ¼ cup mini chocolate chips (optional)