Stock and Stew Technique: Building Flavor with Mirepoix Ratios

Notes

The science behind mirepoix lies in the Maillard reaction, which occurs when vegetables are sautéed, creating complex flavor compounds. Adjusting ratios can tailor the flavor profile—more onions for sweetness, more celery for brightness. Common mistakes include overcrowding the pot, which steams rather than sautées vegetables, and not dicing them uniformly, leading to uneven cooking. Always ensure proper ventilation when cooking with onions to avoid eye irritation. Stock can be made ahead and stored in the fridge for up to 5 days or frozen for up to 3 months. Stews are best made a day ahead to allow flavors to meld and intensify.

Steps

1. 1 Select 2 pounds of onions, 1 pound of carrots, and 1 pound of celery for a classic mirepoix.
2. 2 Peel the onions and carrots, then trim the celery.
3. 3 Dice all vegetables into uniform pieces, roughly 1/4-inch cubes.
4. 4 Heat 2 tablespoons of oil in a large pot or Dutch oven over medium heat.
5. 5 Add the onions first, sautéing until translucent, about 5 minutes.
6. 6 Incorporate the carrots and celery, cooking until softened, about 8 minutes.
7. 7 Season with a pinch of salt to enhance the vegetables' natural flavors.
8. 8 For stock: Add water, aromatics like parsley stems, and simmer gently for 2-3 hours. For stew: Proceed with adding proteins and other ingredients, simmering until tender, about 1-2 hours.
9. 9 Skim any impurities that rise to the surface during cooking.
10. 10 Strain the stock through a fine-mesh sieve if making stock, or adjust seasoning for stew.
11. 11 Taste and adjust seasoning with additional salt and pepper as needed.
12. 12 Cool stock or stew before storing.