01 -
Preheat oven to 350°F (175°C). Line a 12-cup standard muffin pan with paper liners or lightly coat with nonstick spray.
02 -
In a large bowl, whisk eggs, vegetable oil, granulated sugar, and vanilla extract together until smooth and fully blended.
03 -
Fold grated zucchini and drained pineapple into the wet mixture until evenly distributed.
04 -
In a separate bowl, whisk together all-purpose flour, baking soda, baking powder, ground cinnamon, and salt.
05 -
Add the dry ingredients to the wet mixture and stir until just incorporated. Avoid overmixing to ensure a tender crumb.
06 -
Gently fold chopped walnuts into the batter, distributing evenly.
07 -
Divide batter evenly among prepared muffin cups, filling each about three-quarters full.
08 -
Bake at 350°F (175°C) for 18 to 22 minutes, or until a toothpick inserted into the center of a muffin emerges clean.
09 -
Let muffins cool in the pan for 5 minutes, then transfer to a wire rack to cool completely before serving.