Soup Thickeners

What a thickener does in a Nigerian soup

Many Nigerian soups start the same way: palm oil, pepper, crayfish, stock, fish and meat, with leaves added at the end. What turns that broth into something a ball of swallow can pick up is the thickener. It might be a ground seed, a pounded root or a powder, and the choice decides how the soup feels as much as what it tastes like.

Two words come up constantly. Draw describes the stretchy strings you get when you lift a spoon of ogbono or okra soup. Body describes a soup that is simply thick enough to coat the swallow and cling to it, without stretching. Cooks pick a thickener for one or the other.

Draw, creamy or gelled: how the main thickeners compare

Egusi, ground melon seed, is a thickener of a different sort: it adds a rich, nutty body, and when egusi balls are already in the pot some cooks skip the powders altogether.

The four thickeners in this range

Ogbono

Ogbono is the flat kernel of a wild bush mango, sold whole or ground. It is the only one here that makes a soup stretch. Cooks either stir the powder into warm palm oil until smooth or whisk it into warm broth, then add stock gradually over low to medium heat and keep stirring. It is a very oily seed, so freshness matters.

Achi

Achi is the ground seed of a tree from southern Nigeria and western Cameroon. It swells into a gel, so it adds body without the stretch. Most recipes stir it into cool or lukewarm water first, then add it to the soup in portions. Do not confuse it with achara, the grass stalks that give ofe achara its name.

Ofo

Ofo, also written ofor, is the powder from the seeds of a Detarium tree. It is a strong thickener, so cooks start with about a spoonful and dissolve it in hot liquid, since cold water makes it clump. Sources disagree about exactly which Detarium species it comes from.

Ukpo

Ukpo comes from the large seeds of a Mucuna bean. Raw seeds contain compounds that need long processing, including boiling, so ask any seller how a pack was processed and follow the directions on it. It is a different ingredient from ukpaka, the fermented oil bean used to make ugba.

Choosing the right thickener for the soup you are cooking

• Want the stretch? Ogbono, with or without okra.
• Cooking a leafy Igbo soup such as oha or okazi? Achi, ofo or ukpo, or cocoyam if you have the time to pound it.
• Following a family recipe? Use whatever it names, because each has its own flavor.
• Egusi already in the pot? You may not need another thickener.

Whichever you pick, add it gradually and wait several minutes before adding more. These seeds keep thickening as the soup simmers and stands, which makes a thin pot easy to rescue and a thick one hard to undo. Amounts differ a lot by thickener: a family pot may take half a cup to a cup of ground ogbono but only one to four tablespoons of achi or ofo, so a small pack of those powders covers many pots.

Buying and storing seeds and powders

Whole seeds keep longer but need a dry grinder, and several have shells hard enough to need cracking, so most home cooks buy powder, which in the US is usually found at African grocery stores and online. Read the label for what is inside, in what form and with what date. Good powder is dry, loose and clean-smelling, without damp spots or mold. Achi, ofo and ukpo come from legume-family plants, so anyone avoiding legumes should read the allergen statement.

Keep everything in an airtight container in a cool, dry cupboard, away from the steam above the stove. Use a dry spoon every time, because moisture makes these powders clump. Ogbono is very oily and can taste of soap when stale. In one food-science study, vacuum-sealed ogbono flour stayed acceptable in a freezer for about three months before quality slipped, so buy modest amounts.

Three classic dishes and the thickener in each

Ogbono soup pairs the stretch of ogbono with stockfish, smoked fish, assorted meat and ground crayfish; our dried fish and seafood range covers the fish side. Leaves go in last. Oha soup relies on cocoyam, achi, ofo or ukpo for body, and the leaves go in just before serving. Okazi soup uses achi, ukpo or ofo and thinly sliced okazi leaves; see our soup leaves range for the greens.

All three are made to be eaten with a swallow, and pounded yam flour is the classic partner. It is in stock now, ships within 24 to 48 hours and arrives in two to five business days. Shipping is free from five 2 lb bag equivalents to the lower 48 states and DC.

What coming soon means for these four

None of the four thickeners is for sale yet. Each product page has a Notify me form: enter your email and you will hear from us when that item is added. Sign-ups also help us see which of them to stock first. In the meantime, the product pages explain how each ingredient works, so you know what to look for in an African grocery or an online shop.