Whisk together flour, spices, baking soda, baking powder and salt in a medium bowl and set aside.

With a hand mixer, whip egg whites until stiff but not dry.

Mix together buttermilk, pumpkin, sugar, vanilla and butter. Make a well in the dry ingredients and fold in buttermilk-pumpkin mixture; do not over mix. Gently fold egg whites into batter.

Cook on a hot grill until bubbles form at the edges. Flip and cook 2 to 3 minutes more.