Preheat your oven to 350°F and line a 12-cup muffin tin with paper liners. This ensures even heat circulation and prevents sticking during the baking process.
In a medium bowl, whisk together flour, baking powder, baking soda, cinnamon, ginger, nutmeg, cloves, and salt until well combined. Make sure no lumps remain in the dry ingredients.
In a large bowl, whisk pumpkin puree, sugar, vegetable oil, eggs, water, and vanilla extract until smooth and fully incorporated. The wet mixture should be creamy and uniform throughout.
Fold the dry ingredients into the wet mixture using a spatula, stirring just until combined—do not overmix. Gently fold in the chopped pecans, then divide the fall pumpkin muffins crowd batter evenly among the muffin cups, filling each about two-thirds full.
Bake for 20–22 minutes, until a toothpick inserted into the center comes out clean or with just a few moist crumbs. The tops should be golden and slightly domed when ready.
Remove from the oven and let cool in the pan for 5 minutes, then transfer to a wire rack to cool completely. This cooling step prevents the muffins from steaming and becoming soggy.