For the Muffins

• 2 cups all-purpose flour – Creates a soft, tender texture.
• 1 teaspoon baking powder – Helps the muffins rise.
• ½ teaspoon baking soda – Makes the muffins light and fluffy.
• 1 teaspoon ground cinnamon – Adds warm spice.
• ¼ teaspoon ground nutmeg (optional) – Enhances the flavor.
• ½ teaspoon salt – Balances the sweetness.
• 2 large eggs – Provide structure and richness.
• ½ cup vegetable oil – Keeps the muffins moist.
• ½ cup granulated sugar – Adds sweetness.
• ¼ cup brown sugar – Gives a rich caramel flavor.
• 1 teaspoon vanilla extract – Adds warmth and aroma.
• 1½ cups finely shredded zucchini – Naturally moistens the muffins.
• ½ cup chopped walnuts or pecans (optional) – Adds crunch.

For the Cinnamon Streusel

• ½ cup all-purpose flour – Forms the crumb topping.
• ⅓ cup brown sugar – Adds sweetness and caramel flavor.
• 1 teaspoon ground cinnamon – Classic warm spice.
• ¼ cup cold unsalted butter, cubed – Creates buttery crumbs.

Optional Glaze

• ½ cup powdered sugar
• 1–2 teaspoons milk
• ½ teaspoon vanilla extract