In a large bowl whisk together flour, sugar, salt, and baking powder. (sift for best results)
Make a well in the center of the bowl.
Add the milk, buttermilk, egg yolks, butter, oil and vanilla extract to the center of the well.
Gently fold the flour mixture into the wet mixture until flour is combined. Do not over stir.
Fold in stiffened egg whites and stir very gently until egg whites are mixed in.
Let batter rest while the waffle iron is heating up.
When waffle iron is ready add a cup of batter (may need more or less depending on your waffle iron) to the hot griddle. Spread batter out a little if desired.
Cook waffles until golden.
Place waffles on a cookie sheet or tray and brush with butter. Do not stack waffles on top of each other if you want the outsides to stay crisp.
Top waffles with creamed butter and drizzle with hot syrup.