2026 Culinary Specialist A School Practice Test – Complete Fort Lee TOC Prep

In a standard mirepoix, the onion is the biggest contributor by weight. The traditional ratio is two parts onion to one part carrot and one part celery, so onions make up half of the mixture. Carrot and celery each account for about a quarter. Onions form the flavor foundation—their moisture, sweetness, and depth drive the base of the aromatics—while the carrot and celery add aroma and additional sweetness in smaller amounts. So the vegetable contributing the largest proportion by weight is the onion.