Whisk the Dry Foundation: In a large mixing bowl, thoroughly whisk together the all-purpose flour, dark brown sugar, baking powder, baking soda, pumpkin pie spice, and fine sea salt until well combined and lump-free.

Combine Wet Ingredients: In a separate medium bowl, vigorously whisk the pure pumpkin puree, buttermilk, room-temperature eggs, melted butter, and pure vanilla extract until smooth, silky, and uniform in color.

Fold & Rest the Batter (The Secret to Loft!): Pour the wet pumpkin mixture into the dry ingredients. Gently fold with a rubber spatula just until incorporated—a few small lumps are perfectly fine! Do not overmix. Let the batter rest undisturbed on the counter for 10 minutes; the baking soda will react with the acidic buttermilk to create millions of tiny air bubbles that make the pancakes exceptionally fluffy.

Griddle to Golden Perfection: Heat a cast-iron skillet or non-stick griddle over medium-low heat. Brush generously with melted butter. Scoop 1/3 cup portions of batter onto the hot surface. Cook for 3 to 4 minutes until bubbles form and pop on the surface and the edges look set. Carefully slide a thin spatula underneath and flip, cooking for another 2 to 3 minutes until golden brown and cooked through the center.

Stack & Crown with Maple Cinnamon Butter: Stack warm pancakes high on heated plates. Immediately top each stack with a generous scoop of whipped maple cinnamon butter so it melts decadently down the sides. Lavishly drizzle with warm pure maple syrup, scatter with toasted pecans, and serve hot.