The best dunking biscuit revealed: McVitie’s food scientist says Rich Tea is the ‘most robust’ while crumbly Hobnobs can be ‘treacherous’ after experiment to calculate the perfect number of plunges

  • EXCLUSIVE: McVitie’s has revealed the correct way to dunk its range of biscuits
  • Food scientist Dr Farrimond said always dip at a 45 degree angle for strength 
  • Here, FEMAIL reveals how long you should dunk each of your favourite biscuits 

Whether or not to dunk your biscuit in your cuppa divides the nation nearly as much how strong to have your brew. 

Those who enjoy a cheeky dip will have most likely pushed their biccie too far at some point and lost half of it to the bottom of their mug.

But McVitie’s has come to the rescue of eager dunkers, with a new guide revealing the best biscuits for the job. 

The brand’s food scientist, Dr Stuart Farrimond, has performed a scientific experiment to deduce which snacks suit dunking, and which require a certain level of skill. 

Those with chocolate coatings have a barrier around the biscuit which holds it together for longer, while oaty varieties such as Hobnobs are only suitable for short dunks as their particles provide less structural strength to the biscuit.

Here, FEMAIL reveals how long to dip each of your favourite biscuits, according to the experts at McVitie’s.

‘EASY’ DUNKERS 

RICH TEA: 2-8 dunks 

Rich Tea: two to eight dunks. This simple, highly absorbent biscuit is the most robust of all dunkers in prolonged dunk tests. Simple and highly absorbent, Rich Tea has proved the most robust of all dunkers in prolonged dunk tests

How many dunks can your favourite biscuit handle? 

‘EASY’ DUNKERS 

RICH TEA: 2-8 dunks 

 GRANOLA OAT BAKE: 4-8 dunks  

 CARAMEL DIGESTIVE: 3-14 dunks 

‘MEDIUM’ DIFFICULTY DUNKERS

MILK OR DARK CHOCOLATE DIGESTIVES: 2-3 dunks

DIGESTIVES: 2 dunks

FRUIT SHORTCAKE: 2 dunks   

CHOCOLATE HOBNOB: 2-4 dunks

GINGER NUT: 2 dunks

‘DIFFICULT’ DUNKERS

HOBNOB: 2-3 dunks

JAFFA CAKE: 2 dunks

TIPS FOR THE ‘PERFECT’ DUNK

Let the cup of tea cool for three minutes before dunking

This gives each biscuit more chance of surviving intact and doubles the potential dunking time before disintegration.

Hold biscuits at a 45 degree angle 

 This allows for the heat to be distributed to avoid the tip crumbling off on entry  

Dunking time depends on the treat

Chocolate-coated biscuits will hold together longer while oaty ones can crumble in seconds. 

GRANOLA OAT BAKE: 4-8 dunks  

Although oat based, this thick and dense disc is remarkably robust, that shows little sign of water damage in the first three dunks. Integrity is suddenly lost at 13 dunks leading to a total and sudden collapse (with the resultant mug sludge)

CARAMEL DIGESTIVE: 3-14 dunks 

An ideal starter biscuit for novice dunkers, this is a remarkably versatile and flavourful three-layered dunker – the chocolate and caramel layer acting as a glue that holds the biscuit intact after repeated plunges

‘MEDIUM’ DIFFICULTY DUNKERS

MILK OR DARK CHOCOLATE DIGESTIVES: 2-3 dunks 

An initially intimidating choice due to the potential hazard of an overly dunked biscuit falling onto clothes, resulting in an unsightly chocolate smear. Surprisingly, however the sticky molten chocolate layer makes this chocolate-coated biscuit slightly more dunk durable than its naked variant in real world dunking situations

DIGESTIVES: 2 dunks 

The staple dunker, it is absorbent but fragile. Its large diameter and sturdy construction, however, make it a safe choice for those who have graduated from the rookie biscuits

FRUIT SHORTCAKE: 2 dunks    

A remarkably absorbent biscuit, its small size means it is quickly overwhelmed with drink and so is a slightly more challenging dunker

CHOCOLATE HOBNOB: 2-4 dunks 

More challenging than a chocolate-coated Digestive, the Chocolate Hobnob is an easier dunk than the plain Hobnob. Four dunks can only be reached with practice 

GINGER NUT: 2 dunks 

Rock hard when dry, the Ginger Nut is a deceptively difficult dunker. The sweet-tasting biscuit quickly absorbs liquid, causing it to soften suddenly after two dunks. In an amateur’s hands, there is a high risk of a cup sludge outcome

BISCUITS FOR THE ‘EXPERT’ DUNKERS

HOBNOB: 2-3 dunks 

The Hobnob’s rich buttery taste make it an ideal flavour partner for many beverages. Dunking, however, is treacherous, owing to its oat flake-based construction

JAFFA CAKE: 2 dunks

Jaffa Cake: two dunks. The most challenging of all, the Jaffa Cake is very fragile when wet. Its good absorptive capacity mean that it is a flavour-intense treat if dunked successfully

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