In a large bowl, whisk together the flour, baking powder, baking soda and spices.
In a separate bowl, mix together the egg yolk, pumpkin, brown sugar and apple butter. Stir in milk until well-blended. All at once, add milk mixture to dry ingredients and stir until combined.
In a medium bowl, beat egg whites until light and fluffy (you can use a fork, whisk, or electric beater for this). Fold egg whites into batter.
Set the griddle or pan to medium heat. Wait 2-3 minutes. Ladle batter by 1/4 cup amounts onto a preheated nonstick griddle lightly sprayed with cooking spray. Cook until evenly browned on both sides.