Decide how you’re using kohlrabi (raw crunch vs cooked tender) and pick the closest substitute from the list above.
Use the listed ratio: measure by weight for the most consistent results in cooked dishes.
If your substitute is wetter (like cabbage stems), dry it well and reduce cook time to prevent softness.
Taste after seasoning and adjust: add acid (lemon/vinegar) for sweetness or add salt for a flatter, earthy swap.
For stir-fries, add the substitute early like you would kohlrabi, then finish quickly to keep some bite.