In a large mixing bowl, whisk together the sifted flour, ground cinnamon, ground nutmeg, and salt to combine evenly.
In a separate bowl, whisk the pumpkin puree, buttermilk, egg, honey, and vanilla extract until smooth and fragrant.
Pour the wet mixture into the dry ingredients and gently fold everything together until just combined. Be careful not to overmix; a few lumps are fine.
Fold in the chopped pecans, distributing them evenly throughout the batter.
Let the batter rest for about 5 minutes; this helps the gluten relax and results in fluffier pancakes.
Preheat a non-stick skillet or griddle over medium heat until hot and lightly greased.
Pour generous scoops of batter onto the skillet, forming pancakes about 3-4 inches in diameter.
Cook the pancakes for 2-3 minutes, or until bubbles form on the surface and the edges look set; then, flip carefully with a spatula.
Cook on the second side for another 2-3 minutes, until golden brown and cooked through.
Transfer the finished pancakes to a plate, repeat with the remaining batter, and keep warm if needed.
Serve the pumpkin spice pancakes warm, topped with additional pecans, a drizzle of honey, or a dollop of whipped cream for an inviting breakfast treat.