What to use instead of poppy seed
Quick answer
The closest option is Hazelnut, rated acceptable. The answer to the half of the problem sesame cannot solve. Ground poppy seed is a thickener that works because the seed is roughly half oil, and a ground nut is the only common ingredient that behaves the same way. It is sweeter, coarser and paler, so a Bengali posto made with it reads as a korma and a strudel filling tastes of nut rather than of poppy.
It will not do for: Toppings, where the fine dark speckle is the point — use sesame instead; Lemon and poppy seed cake, which is named for the appearance; Anyone avoiding tree nuts, since this introduces an allergen the original does not carry.
All recorded options
Ranked by suitability. Ratios are given only where they are defensible, and always with their basis — by weight or by volume — because spice densities differ.
Hazelnut
AcceptableUse: ~0.75× by volume — Around three quarters the volume of ground poppy seed, since ground nuts are bulkier. For a filling, adjust the liquid rather than the quantity.
The answer to the half of the problem sesame cannot solve. Ground poppy seed is a thickener that works because the seed is roughly half oil, and a ground nut is the only common ingredient that behaves the same way. It is sweeter, coarser and paler, so a Bengali posto made with it reads as a korma and a strudel filling tastes of nut rather than of poppy.
| Flavour | Aroma | Colour | Heat |
|---|---|---|---|
| partial | partial | different | n/a |
Works for
- Ground uses — central European pastry fillings, aloo posto, korma bases
- Any dish where the seed is thickening rather than decorating
Does not work for
- Toppings, where the fine dark speckle is the point — use sesame instead
- Lemon and poppy seed cake, which is named for the appearance
- Anyone avoiding tree nuts, since this introduces an allergen the original does not carry
Cuisine: Moves a Bengali posto towards a North Indian korma and a central European filling towards a frangipane.
Recorded against hazelnut as the nearest entity held; ground almond or cashew is the more usual choice and behaves the same way. Poppy seed splits into two substitution problems and this record answers the ground one — sesame answers the topping one.
Sesame seed
SituationalUse: 1× by volume — Like for like, and only where the seed is a topping. There is no sensible ratio for the ground use, because sesame grinds to tahini rather than to a thickening paste.
Close enough to be unremarkable where the seed is a topping, and no use at all where it is ground. Sesame is the nearest thing to poppy seed in flavour that most kitchens have: mild, nutty, sweetish, and made rather than released by toasting, exactly as poppy seed is. It is larger and paler, so a bagel looks different, and it is more assertively nutty, so a delicate bake shifts noticeably.
| Flavour | Aroma | Colour | Heat |
|---|---|---|---|
| different | different | close | n/a |
Works for
- Breads, rolls and crackers where the seed is a topping
- Dressings and noodle dishes where the seed is a scattered garnish
- Sweet baking, where sesame is the rare topping swap that does not read as savoury
Does not work for
- Any ground use — central European poppy seed fillings, aloo posto, korma bases. Ground poppy seed thickens a sauce; ground sesame turns to tahini and behaves like an oil.
- Lemon and poppy seed cake, where the speckle is the whole visual identity of the bake
- Anywhere the fine texture of poppy seed matters — sesame is several times the size and reads as a different ingredient in the mouth
Cuisine: Largely neutral as a topping, since both seeds are at home nearly everywhere. Only the ground uses carry a cuisine implication, and there the swap does not work at all.
Poppy seed is two substitution problems sharing a name, and answering only one of them is how most references get this wrong. As a topping it is nearly interchangeable with any small seed, and sesame is the closest. As a ground thickener it is close to irreplaceable, because the roughly fifty per cent oil content does the work rather than the flavour: ground almond or cashew is the only realistic stand-in for aloo posto or a korma base, and it is coarser and sweeter.