Start with a purpose
Choose a light base for delicate soups or a roasted base for deeper sauces. Stock often emphasizes bones and body, while broth often emphasizes meat and seasoning, but labels vary. Low-salt purchased stock is a practical starting point when time is short.
Choose clean, complementary ingredients
Onion, carrot and celery offer a familiar base. Mushroom stems add savory depth. Avoid moldy, spoiled or dirty scraps; extended cooking does not make them suitable. Strong cabbage-family vegetables and excessive onion skins can dominate a delicate stock.
Keep the extraction controlled
Cover your chosen ingredients with water, bring up to temperature and maintain a gentle simmer rather than a violent boil. Skim if clarity matters. A vegetable stock needs less time than a bone stock; use a specific recipe rather than simmering every base all day. Strain carefully without pressing if you want a cleaner result.
Season after reduction; cool promptly
Reducing concentrates salt, so finish seasoning after you know the final volume. Divide finished stock into shallow containers and refrigerate promptly, within two hours, or one hour above 90°F. Refrigerate at 40°F or below and use within three to four days, or freeze. Label portions with their date and volume.
Your next kitchen exercise
Make a small vegetable stock from fresh onion, carrot, celery and mushroom trimmings using a dedicated recipe. Taste a spoonful before and after a modest reduction.
