Dried sourdough starter contains bacteria from a specific strain of sourdough. You can activate it at home, then maintain and bake with a starter full of history.
How to Activate a Dried Sourdough Culture
Reduced Chicken Stock
Homemade chicken stock is so easy to make, and uses mostly leftover ingredients. Reducing it concentrates the flavor. Recipes you make using your own homemade chicken stock will be so much better than using the store-bought kind.