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Peaso is Noma's miso made from cooked yellow split peas instead of soybeans, mashed with rice koji and salt and aged for about three months. It uses about 4–5% salt, half or less of a classic miso, so yeasts and lactic and acetic bacteria act faster and the flavour is brighter and fruitier.
A short entry: the sources we found record only what is said here about Peaso itself.
DocumentedSoy and legumes3 months
Recipe
Amounts from a sourceLabel of Noma Projects' retail Elderflower Peaso (percentages by weight). The Kyoto Peaso is 34 % peas, rice koji, 22 % kanzuri and salt. Both are pasteurised.
Noma gives no cooking time. Output: cooked split peas.
Flavour
Not documented
Texture
Not documented
Colour
Not documented
Microbes at work in this step
Not documented for this step.
Method
Measured measured in a studySet fixed by a specification or tested recipeReported one source reports itTypical a general value, not sourced for this fermentUnconfirmed not yet checked against a source
At a glance
Peaso is Noma's miso made from cooked yellow split peas instead of soybeans, mashed with rice koji and salt and aged for about three months. It uses about 4–5% salt, half or less of a classic miso, so yeasts and lactic and acetic bacteria act faster and the flavour is brighter and fruitier. Made in 3 steps over 3 months. The longest step, pack and age, takes 3 months (Noma Projects 2026). Salt is 4–5 % (Noma Projects journal 2026). Aspergillus oryzae, grown on rice as koji; its enzymes break down the pea protein and starch and Wild yeasts, lactic acid bacteria and acetic acid bacteria during ageing do most of the fermenting.
Unlike soybean miso, the base is yellow split peas, and the salt is about half or less, so the ferment ages faster and tastes brighter and fruitier. Flavoured versions add scraps such as elderflower pulp.
Other Noma novel misos (Gotland lentils, fava beans, rye bread)The same miso method on other local substrates, studied alongside yellow pea [kothe2024].