Preheat the oven to 350 degrees F. Grease a 12-cup muffin tin.
In a small bowl, mix together the flour, baking soda, cinnamon, nutmeg, and salt.
In a medium bowl, use a fork to beat together the sugar, oil, eggs, and vanilla. Add the canned pumpkin and mix well. Slowly add in the dry ingredients and stir until just combined.
Pour the batter evenly among the 12 muffin tins. Bake for 30 minutes or until a toothpick comes out clean. Let the muffins cool on a wire rack for 10 minutes. Remove the muffins from the pan and place them on the wire rack to finish cooling.
The muffins taste wonderful warm or at room temperature. You can re-heat them in the microwave on high for 20-25 seconds. Store leftover muffins in an air-tight container.