Whole Wheat Buttermilk Waffles

Sift before measuring:
⅔ cup all-purpose flour
resift with:
1 teaspoon baking soda
¾ teaspoon baking powder
¾ teaspoon salt
add:
2 cups whole-wheat flour
(I haven't tried but maybe also 1 teaspoon ground cinnamon and one teaspoon vanilla)?

Beat:
3 egg yolks
To the yolks add:
2⅓ cups buttermilk (or the equivalent in powdered buttermilk, which comes to 9¼ Tablespoons of powder and the same amount of water)
½ cup oil + one Tablespoon
1 Tablespoon honey

Mix the liquid mixture into the dry ingredients

Beat until stiff:
3 egg whites
Fold into the batter

Cook on the waffle iron

Serve with syrup, fruit, etc.