Preheat your oven to 375°F (190°C). Line a standard 12-cup muffin tin with paper liners or lightly grease them with non-stick cooking spray to ensure the muffins don’t stick.
In a large mixing bowl, whisk together the all-purpose flour, granulated sugar, brown sugar, baking soda, salt, and pumpkin pie spice. Ensure there are no large lumps of brown sugar remaining in the mixture.
In a separate medium bowl, beat the eggs lightly. Add the pumpkin puree, vegetable oil, and vanilla extract. Whisk until the mixture is smooth and the ingredients are fully incorporated.
Create a well in the center of the dry ingredients and pour in the wet mixture. Using a spatula, gently fold the ingredients together until just combined. Be careful not to overmix, as this can make the muffins tough; it is okay if a few small streaks of flour remain.
Divide the batter evenly among the 12 muffin cups, filling them nearly to the top to achieve that high bakery dome. Bake for 20 to 22 minutes, or until a toothpick inserted into the center comes out clean. Let them cool in the tin for 5 minutes before transferring them to a wire rack.