For example, a quick search found this one, posted in The Hippo Lounge:
Quote: The best waffles ever:
Raised Waffles:
Mix your batter up at least 12 hours before you want to cook waffles.
1 ¾ cups milk. (Any kind, 1%, 2%, or whole milk)
½ cup butter (if you use margarine, NOT soft margarine. Use butter! It's better.)
2 cups flour
1 tablespoon sugar
1 ½ teaspoons yeast
½ tsp salt
2 large eggs
1 teaspoon vanilla extract.
1. Heat milk and butter until butter is melted, in a microwave is fine. Let cool to lukewarm.
2. Mix flour, sugar, salt and yeast in a large bowl to combine.
3. Whisk milk/butter mixture into dry ingredients.
4. Beat eggs and vanilla until combined, stir into flour/milk mixture.
5. Cover closely and refrigerate at least 12 hours, up to 24 hours.
6. Stir the batter down (It will deflate, this is fine!)
7. Bake on preheated waffle iron as usual. It will make seven 7 inch round waffles or 4 big 9 inch waffles.
The recipe calls for instant yeast, but any yeast will do. If you don't have instant yeast, I would let it proof in the warm milk mixture for 10 minutes before stirring it into the flour mixture.
I NEVER use instant yeast, and I ALWAYS proof my yeast separately. This business of mixing it into the dry ingredients has never worked for me.