Ran out of white rice mid-recipe? Orzo will do the job at 1:1 (cook like pasta) — but only if you also adjust for what the swap takes away or adds. Grains swap one-to-one by volume — a cup of one dry grain replaces a cup of another — but that is where the simplicity ends. Each grain drinks a different amount of water and needs a different amount of time on the heat, so the swap is really a cooking adjustment, not just a measuring one. This page gives the ratio, shows it in a table, and walks through three real dishes so you can see exactly what to change in the pot alongside the grain itself.
The ratio, in a table
The table below converts white rice to orzo for the amounts you are most likely to meet. The rule is always the same: 1:1 (cook like pasta).
| White rice called for | Orzo to use |
|---|---|
| 1/4 cup | 1/4 cup |
| 1/3 cup | 1/3 cup |
| 1/2 cup | 1/2 cup |
| 2/3 cup | 2/3 cup |
| 3/4 cup | 3/4 cup |
| 1 cup | 1 cup |
| 1 1/2 cups | 1 1/2 cups |
| 2 cups | 2 cups |
By weight, one cup of white rice is about 198 g (spooned and levelled, King Arthur Baking). Our density table does not list a grams-per-cup figure for orzo, so no weight is given for it here — measure it by volume. All weights on this page are approximate; verify with a kitchen scale when the result matters.
Worked examples
Example 1: Orzo salad
A recipe for a rice salad calls for 1 cup of white rice. Using the ratio, that becomes 1 cup of orzo. Boil the orzo in plenty of salted water, drain it, and toss it with a little oil so it does not stick, then let it cool before adding the vegetables and dressing. The salad is tender and light, with a slight chew that rice does not have.
Example 2: Orzo soup
A recipe for a rice soup calls for 1 cup of white rice. Using the ratio, that becomes 1 cup of orzo. Add the orzo to the simmering soup near the end of cooking, and serve the soup straight away — orzo keeps absorbing liquid, so a soup left standing will thicken and the pasta will go soft. Cook it in the soup, not separately, so it takes on the flavour.
Example 3: Orzo pilaf
A recipe for pilaf calls for 1 cup of white rice. Using the ratio, that becomes 1 cup of orzo. Toast the orzo in a little oil with the onions first, then add stock and simmer until tender, and let it rest before fluffing. The pilaf is tender and slightly chewy, and it takes on the flavour of the stock well.
What changes in the result
Orzo is a small pasta shaped like a grain of rice, and it swaps one-to-one by volume — but it cooks like pasta, not like rice. That means boiling it in plenty of salted water, draining it, and tossing it with a little oil so it does not stick, rather than simmering it in a measured amount of water until the liquid is absorbed. The result is tender and slightly chewy, with a mild flavour that takes on sauces well, and it is a good swap for salads, soups and pilaf-style dishes where a small, tender grain is wanted. The main thing to remember is the method: cook it like pasta, and do not try to cook it absorption-style like rice.
When not to substitute
Do not swap in orzo where the dish needs rice's ability to absorb liquid. A risotto-style dish, a rice pudding, or a curry served over rice will be wrong with orzo: the pasta does not drink up sauce the way rice does, and it will sit in a puddle rather than soaking the sauce in. Do not use it in a dish that must be gluten-free either — orzo is wheat pasta. And do not overcook it: orzo goes from tender to mushy quickly, so taste it a minute before the packet says it will be done.
Practical guidance
Always rinse the grain you are swapping in, unless the recipe depends on surface starch for creaminess — rinsing washes away dust and loose starch and gives a cleaner flavour, but it also removes the starch that thickens a risotto-style dish. Cook the new grain with the lid on and resist lifting it to peek: every lift lets out steam and adds minutes to the cooking time. Taste for doneness rather than trusting the clock, because the age of the grain and the width of your pan both shift the timing. Leftover cooked grains keep for several days in the fridge and freeze well, so cook a little extra and use it for fried rice or a grain salad the next day. All amounts on this page are approximate; a kitchen scale is the most reliable way to portion dry grains for a large batch.
Frequently asked questions
How much orzo do I use instead of 1 cup of white rice?
Use 1 cup — the ratio is 1:1 by volume. Our density table does not list a grams-per-cup figure for orzo, so measure it by volume. Cook it like pasta: boil it in plenty of salted water, drain it, and toss it with a little oil.
Do I cook orzo like rice or like pasta?
Like pasta. Boil it in plenty of salted water and drain it — do not try to cook it absorption-style like rice, or it will go sticky and uneven. Toasting it in oil first, as you would for a pilaf, works well too.
Can I use orzo in soup?
Yes, and it works well — add it near the end of cooking and serve the soup straight away. Orzo keeps absorbing liquid, so a soup left standing will thicken and the pasta will go soft.
Does orzo taste like rice?
It is milder and a little chewier than white rice, with a smooth, pasta-like texture. The flavour is neutral, so it takes on sauces well, but it will not absorb a sauce the way rice does.
Is orzo gluten-free?
No — orzo is wheat pasta, so it contains gluten. If the dish must be gluten-free, use quinoa or rice instead.
Scaling the swap up or down
Scaling a grain swap is simple by volume — the ratio is one-to-one, so double the recipe and you double both numbers — but the cooking does not scale in the same way. A doubled pot of grains does not take twice as long to cook: the grains still cook in about the same time, but a larger pot needs a little more water, because more steam escapes, and a slightly longer rest off the heat, because a big pot holds its heat longer. For a very large batch, use a wider pot rather than a taller one, so the grains cook evenly instead of turning mushy at the bottom and hard at the top. If you are scaling down to a single serving, cook the grain in a small saucepan and watch it closely — a small amount of grain can go from done to dry in a minute. Leftover cooked grains keep for several days in the fridge, so when in doubt, cook a little extra rather than a little too little.
If the swap goes wrong — and how to store the substitute
If the grains stick together in a clump, they were probably stirred while cooking or left to sit in the pot too long — fluff them with a fork as soon as they come off the heat, and spread them on a tray to cool if they are for a salad. If the pot boils dry before the grain is tender, add a splash of hot water and put the lid back on; cold water shocks the grains and makes them uneven. If the dish tastes bland, the grain was cooked in plain water — cook the next batch in stock, or add a bay leaf and a pinch of salt to the water. Keep dry grains sealed and dry, and label the jar, because several grains look alike once they are out of the packet.