Which mirepoix ratio is considered classic for stock making, and what is its purpose?

• A. Traditionally 3 onions to 2 carrots to 2 celery stalks, used to color the stock.
• B. Traditionally 1 onion to 1 carrot to 1 celery stalk, used to thicken the stock.
• C. Traditionally 2 onions to 1 carrot to 1 celery stalk, used as the flavor foundation for extracting sweetness and aromatic depth.
• D. Traditionally 4 onions to 1 carrot to 2 celery stalks, used to accelerate cooking.

Answer: (C)

The main idea here is that a mirepoix is the flavor foundation for stock, and its balance is tuned to extract aroma and sweetness during long simmering. The classic ratio of two onions to one carrot to one celery stalk provides a harmonious blend: the onions bring savory sweetness and depth, the carrot adds gentle sweetness to round out any bitterness, and the celery contributes a bright, herbal aroma. Together, they release flavors into the liquid as the stock simmers, creating a well-rounded base that supports the bones and other ingredients without dominating the taste. This approach is intended to flavor the stock, not to color it or to thicken it; coloring would come from browning if you were making a brown stock, and thickening isn’t achieved by the mirepoix itself. The other options describe different aims or imbalances (too onion-forward, or aiming to color, or suggesting thickening or faster cooking), which don’t align with the traditional purpose of a classic stock mirepoix.