How to test food and drink texture at home

Every recipe on this site is graded against the IDDSI framework. Those levels are not a matter of opinion — each one is defined by a physical test you can run in your own kitchen in under two minutes. If you have been told to stay at a particular level, these are the tests that tell you whether what is in front of you actually is that level.

Jaw Surgery Diet

Texture graded against the IDDSI framework. Not individually reviewed by a clinician — how this site works

Test it the way you will eat it. Thickness changes with temperature, so a drink that passes at room temperature can be too thick chilled or too thin warmed. IDDSI is explicit that testing should be done at the temperature the food or drink will actually be served at.

The Flow Test — for drinks

This is the test that separates Levels 0 to 3. It measures how much liquid is left in a syringe after ten seconds of draining.

You need the right syringe

This matters more than it sounds. The test depends on the physical dimensions of the barrel, not just its stated volume: the 0–10 mL length must measure 61.5 mm. Plenty of syringes sold as "10 mL" have different barrel lengths and will give a reading you cannot rely on. Either tip — slip tip or Luer lock — is fine.

To check a syringe is sound before you trust it: with the plunger out and the nozzle open, 10 mL of plain water should drain right through in about 7 seconds. IDDSI publishes verified product codes by country, and sells a standardised funnel that removes the syringe question entirely — worth using their list rather than guessing from a product page.

Running the test

Stir the drink thoroughly first — an unmixed drink gives an inconsistent reading.
Take the plunger out of a clean, dry syringe.
Cover the nozzle with a finger and fill to the 10 mL mark.
Release your finger and start the timer at the same moment.
Re-cover the nozzle at exactly 10 seconds.
Read how much is left in the syringe.

Run it at least twice. If flow stops suddenly, there may be a lump — which is itself worth knowing.

IDDSI level	Left after 10 seconds	What that feels like
0 – Thin	0–1 mL left	Flows like water. Drains almost completely.
1 – Slightly Thick	1–4 mL left	Thicker than water, still pours and flows.
2 – Mildly Thick	4–8 mL left	Sippable, pours quickly from a spoon.
3 – Moderately Thick	8–10 mL left	Can be drunk from a cup; flows off a tilted spoon.

Level 4 does not have a flow test result. Anything that thick simply stays in the syringe, so the flow test cannot tell a very thick Level 3 from a Level 4. For that you need the spoon tilt and fork drip tests below.

The Fork Drip Test — thick drinks and fluid foods

Uses a standard metal dinner fork, where the gaps between the tines measure about 4 mm. Spoon the sample onto the fork and watch what happens.

Level 3 — Moderately Thick. Drips slowly, in dollops or strands, through the tines.
Level 4 — Extremely Thick. Sits in a mound on top of the fork. A little may come through and form a short tail, but it does not drip or flow continuously.

The Spoon Tilt Test — Levels 4 and 5

This one is about stickiness and whether the food holds together, which matters because food that clings to the spoon also clings in the mouth and throat.

A full spoonful must plop off in one piece when the spoon is tilted or turned sideways.
It should not be so sticky that it stays put, and not so runny that it dribbles off.
A thin film left on the spoon is fine — as long as you can still see the spoon through it.

The Fork Pressure Test — Levels 4 to 7

Press your thumb onto the bowl of the fork, just above the tines, and push down onto the food until your thumbnail goes white. That blanching point is roughly 17 kPa, which is about the force your tongue generates during a swallow. So this is a direct test of whether your tongue could do what you are about to ask it to do.

How small do the pieces need to be?

Level	Adult	Children
5 – Minced & Moist	4 mm — the width of the gaps between fork tines	Smaller than the width of the child's little fingernail
6 – Soft & Bite-Sized	15 × 15 × 15 mm — about an adult thumbnail, or the width of a fork	8 × 8 mm — about half a fork's width

The 15 mm figure is not arbitrary: it sits deliberately below the average adult tracheal diameter (roughly 22 mm in men and 17 mm in women), so that a piece which goes the wrong way can still pass rather than block.

A note on thickened drinks. Research on thickened liquids has found some starch-based thickeners keep thickening for hours after mixing. If a drink has been standing a while, it is worth testing again rather than assuming it is where it was.

Recipes by level

Liquid-stage recipes Puréed-stage recipes Soft-stage recipes All 124 recipes

Test methods and figures on this page follow the IDDSI Testing Methods and the IDDSI Framework. IDDSI is an independent body; this site is not affiliated with it.

Medical disclaimer. Jaw Surgery Diet is patient education, not medical advice, and it does not create a doctor–patient relationship. Texture stages here follow the IDDSI framework, but the right stage for you is the one your own surgeon, speech-language pathologist or dietitian has set. If you are unsure whether a texture is safe for you — or if you cough, choke or feel food catching when you swallow — stop and contact your care team.