It is usually necessary to grill whole wheat pancakes a little longer than for white flour pancakes. Bake until the bubbles are well-formed before turning.
Combine and beat egg yolks, milk and vegetable oil. Add this to the flour mixture and blend. Fold in the stiffly beaten egg whites.
Fry on medium hot griddle until bubbles are well-formed around edges of pancakes; turn and cook other side 2 minutes. Or bake in waffle iron. Reheat waffle iron before putting another waffle in each time.