A List of Foods Containing YeastLeavened Breads – Yeast\\'s Most Famous Creation. Yeast is a key ingredient in almost all leavened breads, meaning those that are risen via fermentation.Sweet Treats Containing Yeast. Many other baked goods made using a dough contain yeast. Niche Yeast Foods – Yeast Extract and Nutritional Yeast. Unexpected Foods Featuring Yeast.