Preheat oven to 425 degrees Fahrenheit and line a 12-cup muffin tin with paper liners.
In a large bowl, whisk together the flour, baking soda, baking powder, sea salt, and spices. Set aside.
In another smaller bowl, whisk together the Libby's pumpkin, brown sugar, sugar, eggs, melted butter, and vanilla extract until smooth and combined.
Add the wet ingredients to the dry ingredients and mix gently with a wooden spoon or rubber spatula, until just combined, but try not to overmix the batter.
Using a 4 TBS cookie scoop, scoop batter into lined muffin tins. Fill each cup nearly to the top and evenly between the 12 cups.
Bake the muffins at 425 degrees for 5 minutes, then reduce the heat to 350 degrees and bake 10-12 more minutes or until a toothpick inserted into the center comes out clean. The muffins will puff up and crack open on top.
Let the muffins cool for 5-10 minutes in the muffin tin, then transfer them to a wire rack to cool completely.
Store muffins in an airtight container for 3 days or freeze for up to 3 months.
Notes
That initial high heat is what creates a gorgeous domed muffin top, so make sure not to skip it.
Measure flour correctly (spoon and level) for light, fluffy muffins. Too much flour will make the muffins stiff.
If you want to make your own pumpkin pie spice blend instead, here’s a good recipe to use.You’ll want to use about 2 1/2 teaspoons of pumpkin pie spice for this recipe.