Preheat oven to 350F. Spray a 12-cup muffin tin with nonstick spray, or line with cupcake liners.
In a medium bowl, whisk together the flour, salt, baking powder, baking soda, and pumpkin pie spice. Set aside.
In a large bowl, add the granulated sugar, brown sugar, and eggs. Using a mixer, beat for 2 minutes - the mixture will begin to lighten in colour. Add in oil, yogurt, and pumpkin puree. Mix until combined - the mixture will be very thin.
Add the flour mixture into the wet mixture, and mix until just combined. If you are adding a mix-in to you batter, add at this point and stir to incorporate evenly.
Spoon batter into the prepared muffin tin. Fill the cups all the way to the top.
Sprinkle the pecans topping evenly over the 12 muffins.
Bake for 22-25 minutes until muffins are golden brown on top. Insert a toothpick into the centre of a muffin to test if fully baked - toothpick should come out clean with only a few moist crumbs.
Enjoy :)