I am glad I made the Basic Pancake Batter to learn the proper consistency of the starter. My starter consistency varies so now I have a target to shoot for.
After evaluation, I mixed in my sourdough starter and proofed in the refrigerator for 3 hours. You can see how the batter changed in the pictures below.
The finished waffles were fluffy with air pockets showing the effects of the starter. They were delicious!
Batter pics: 1. Basic Pancake Batter 2. Refrigerator proofed sourdough batter