Pumpkin Pancakes

1 1/4 c flour
6 tbs sugar
2 tsp baking powder
1 1/4 tsp pumpkin pie spice
3/4 tsp salt
1 1/3 c whole milk
3/4 c canned pure pumpkin
4 eggs, separated (room temperature)
1/4 c butter, melted
1 tsp vanilla

Whisk first 5 ingredients in large bowl to blend. Whisk milk, pumpkin, egg yolks, melted butter and vanilla in medium bowl to blend well. Add pumpkin mixture to dry ingredients; whisk just until smooth (batter will be thick). Using electric mixer, beat egg whites in another medium bowl until stiff but not dry. Fold whites into batter in 2 additions. Brush large nonstick skillet with oil; heat over medium heat. Working in batches, pour batter by 1/3 cupfuls into skillet. Cook until bubbles form on surface of pancakes and bottoms are brown. They may take a little longer to cook than regular pancakes, so turn down the heat so that they will not burn. Serve with syrup