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Bulb onion
Aromatics · Ks

Bulb onion

89.1% water · 40 kcal

Per 100 g
40 kcal Energy
1.1 g Protein
9.34 g Carbs
0.1 g Fat
1.7 g Fibre
Gluten-free Year round · stored for winter

Let’s cook with it → Invent something with it

What it is for

They give the character. Same technique, same ingredient, a different trio of spices — and the dish moves to another cuisine entirely. Most of their aroma molecules are volatile.

Where it catches you out

Volatile ones go in last, sturdy ones first. Mint and basil after the heat; bay and cinnamon right at the start.

The knack

If liquid pools during sautéing, cook the onion in batches; adding more oil does not remove its water.

Storage and health

How to keep it, and who it suits.

Keeping it

Keep dry and ventilated at about 4 °C for 6-9 months; once cut, refrigerate sealed for 7 days.

Gluten-free

Plain bulb onion is naturally gluten-free.

Glycaemic index

This ingredient carries no meaningful carbohydrate, so it has no glycaemic index. On its own it will not move blood sugar; what you eat alongside it decides that.