Onion, diced Substitutes — Tested Swaps & Ratios

Onion, diced substitutes

Tested swaps for diced onion, with ratios and sources.

Raw and cooked onion are not interchangeable — caramelization transforms sweetness and pungency. Match the recipe's preparation state.

Equal volume chopped leek, white and light-green parts only (soups, sautés, quiches) (A Couple Cooks)
Milder, sweeter result. Rinse thoroughly before slicing — leeks trap grit.
Two shallots per medium onion (sauces, vinaigrettes, delicate dishes) (The Kitchn)
Shallots are milder and sweeter; use roughly 2:1 by volume to match onion intensity.

Measure substitutes by weight where you can. The Onion, diced converter gives the grams.

Note: our substitutions are direct, not chained — we don't recommend substituting a substitute.