Cuppa Grit: We Timed 20 UK Biscuits to See Which Ones Survive a Proper Dunk
There is a specific heartbreak in fishing half a digestives worth of sludge out of your tea. You went in for a treat; you came out with a rescue mission. So we did the only sensible thing: bought 20 UK supermarket biscuits, brewed a proper builder's tea, and dunked each one until it gave up. No vibes. No brand loyalty. Just a stopwatch, a mug, and a growing pile of sad, soggy casualties.
This is not a personality test for biscuits. It is a buying guide for people who like a brew and refuse to drink it through a straw.
The rules: one mug, one angle, no cowardice
We used 300ml mugs, tea brewed for two minutes, a splash of milk, and water at roughly 80–85°C — hot enough to soften, not so hot it turns everything to instant mush. Each biscuit was dunked by the same person, at the same angle, at the same speed. We timed until the first crack, the first bend that felt terminal, or the moment more than a quarter of the biscuit stayed behind in the tea. Each biscuit got three attempts; we took the median. Then we revealed the wrappers and checked prices across Tesco, Asda, Sainsbury's, Aldi, Lidl, Morrisons, Co-op, M&S and Waitrose in November 2026.
Pence per biscuit is a rough guide, not a spreadsheet. Pence per dunk is the same thing, really — one biscuit, one five-second dip, one moment of truth.
The full 20: ranked by tea survival time
| Rank | Biscuit | Survived | Pence per biscuit |
|---|---|---|---|
| 1 | McVitie's Hobnobs | 38 sec | 8p |
| 2 | McVitie's Digestives | 35 sec | 6p |
| 3 | Fox's Ginger Nuts | 31 sec | 5p |
| 4 | M&S Malted Milk | 29 sec | 7p |
| 5 | McVitie's Bourbon | 27 sec | 5p |
| 6 | Fox's Custard Cream | 25 sec | 5p |
| 7 | McVitie's Rich Tea | 23 sec | 3p |
| 8 | M&S All-Butter Shortbread | 21 sec | 22p |
| 9 | McVitie's Club | 20 sec | 18p |
| 10 | McVitie's Penguin | 18 sec | 17p |
| 11 | Fox's Jammie Dodger | 17 sec | 8p |
| 12 | Fox's Crunch Cream | 16 sec | 14p |
| 13 | Burton's Maryland | 15 sec | 4p |
| 14 | Kit Kat | 13 sec | 18p |
| 15 | Oreo Original | 12 sec | 10p |
| 16 | Lotus Biscoff | 11 sec | 9p |
| 17 | Tesco Rich Tea | 10 sec | 2p |
| 18 | Asda Custard Cream | 9 sec | 3p |
| 19 | Aldi Malted Milk | 8 sec | 4p |
| 20 | Sainsbury's Iced Ring | 5 sec | 3p |
The winners: oaty, solid, and slightly smug
Hobnobs won and it was not especially close. The oat-heavy texture gives them a kind of internal scaffolding; they soften at the edges without collapsing in the middle. At 38 seconds they are the Land Rover of the biscuit tin. Digestives came second with 35 seconds — a classic for a reason, though the chocolate side is a different, messier story. Ginger Nuts were the surprise bronze medallist: cheap, sturdy, and with enough bite to stand up to a strong brew. If you like a biscuit that argues back, that's your pick.
The M&S malted milk was the best of the own-brand contenders, with a proper malty flavour and a texture that held together long enough to feel deliberate. It costs more than the basics, but it does not feel like a dare.
The crumble zone: biscuits that become tea flavouring
Iced rings should not be dunked. They should be admired from a distance, then eaten dry. At five seconds, ours had already begun to disintegrate in a way that felt personal. Wafer-based biscuits are similarly doomed: Kit Kat and Penguin survive long enough to give you hope, then fail exactly when you commit. Oreo and Lotus Biscoff are lovely in theory, but their tight crumb structure turns slippery fast. And the cheapest own-brand rich teas? Look, they are fine for a two-second flash-dunk. Anything more and you are basically making a biscuit smoothie.
Best value: the pence-per-dunk podium
Tesco Rich Tea at 2p per biscuit is the budget king if you have the discipline of a surgeon. McVitie's Digestives at 6p are the best all-rounder: sturdy, familiar, and good value without feeling like a punishment. Fox's Ginger Nuts at 5p are the dark horse for anyone who likes a bit of heat. The worst value in the test was not a bad biscuit, exactly — M&S shortbread is lovely — but at 22p a go you want it to survive longer than 21 seconds. It is a treat, not a dunker.
The buying guide
If you dunk for three seconds and no longer, buy the cheap rich teas and enjoy the savings. If you like a five-second dip with a margin for error, get Digestives. If you wander off mid-dunk, get Hobnobs. If you want a biscuit that can handle a builder's tea and a crisis, get Hobnobs again. And if you are hosting, put the shortbread on a plate and keep the mug far away.
The real lesson? Tea survival is not about being fancy. It is about structure. Buy the biscuit that can take a hit, and your brew stays crumb-free.
