Onion vs Leek
A side-by-side guide to substituting Leek for Onion (or vice versa).
Leek works as a 1:1 swap for Onion in most recipes.
Side-by-side
Leek
Conversion: 1:1 substitution (use the same amount)
Tags: common
Notes: Leeks are milder and slightly sweeter than onions; use equal volumes but use the white and light green parts only, and clean thoroughly as they trap soil between layers.
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Leeks are milder and slightly sweeter than onions; use equal volumes but use the white and light green parts only, and clean thoroughly as they trap soil between layers. The conversion is 1:1 substitution (use the same amount).
Common questions
Yes — Leeks are milder and slightly sweeter than onions; use equal volumes but use the white and light green parts only, and clean thoroughly as they trap soil between layers. Ratio: 1:1 substitution (use the same amount).
1:1 substitution (use the same amount). For other quantities, use the SubSwap calculator.
They are similar in most uses, but Leeks are milder and slightly sweeter than onions; use equal volumes but use the white and light green parts only, and clean thoroughly as they trap soil between layers..
Leek is one of the options SubSwap lists for Onion. The 'best' choice depends on your recipe — see the full list of Onion substitutes.
Looking for more Onion substitutes beyond Leek?
See all Onion swaps →