In a large mixing bowl whisk together the flour, sugar, baking powder, baking soda, kosher salt, nutmeg, cloves, allspice, and cinnamon.
Place the egg whites in a small bowl and beat until stiff peaks form, about 1 to 2 minutes.
In a separate bowl, whisk the egg yolks together with the buttermilk and the pumpkin purée.
Pour the buttermilk and pumpkin mixture into the dry ingredients along with the melted butter and whisk just until the flour disappears.
Using a spatula, gently fold in the beaten egg whites, blending just until combined. Let the batter rest for about 15 minutes.
Heat your electric griddle to 340-degrees. If you’re using a stovetop griddle, warm the griddle using a setting slightly below medium heat.
When the griddle is hot, drop the batter on the surface, about ¼ cup for each pancake, leaving enough room between each to flip them.
When the pancakes are just set on top and lightly golden on the bottom, about 8 to 10 minutes, flip them. Continue cooking until golden and the center is cooked through about 5 more minutes.
These pancakes are a bit thicker and take a few minutes longer to cook through. Serve with warm maple syrup and toasted chopped pecans.