After posting a little quiz on Facebook about gelatine the other day, I got a bunch of emails, with loads of questions.  I thought I better write up a quick explanation, providing answers for many of you, then I found this information on the British Larders site.  Couldn’t have said it better myself, so I decided not to.  (After getting an ok from the lovely people at Brittish Larder of course. ) 

Hope this solves a lot of problems that you may be having.

How to Use Gelatin

Following a conversation with Trish, a regular reader and user of the British Larder, about my usage of gelatine, I was prompted to write a page on the origins and usages of gelatine in the UK.

The sheet size of UK leaf gelatine changed to half size a few years ago, but it still confuses especially as the catering industry use another size of gelatine which comes with different grades and strengths. In the UK you can buy a variety of branded gelatine leaves, the two that I’m most familiar with are G.Costa and Super Cook Select Platinum Grade. My understanding is that though the dimensions changed, the strength remained the same, so in short, it is exactly the same thing just a different size.

This page should give you enough information to feel confident to use gelatine either at home or commercially.

Please note that the sizes and formats described apply to the UK only and may vary in other countries.

What is Gelatin?

Gelatine is an odourless, colourless and tasteless solid substance made from protein derived from beef and veal bones, tendons and other tissue.  Much of the commercial stuff is a by-product of pig skin.  It’s commonly used as a gelling or setting agent in cookery, both savoury and sweet. Gelatine is an irreversible hydrolysed form of collagen and is classified as a foodstuff with an E-number E441. You can find it in lots of everyday foods such as marshmallows, jellies and some low-fat yoghurt’s and set desserts. Some dietary or religious customs forbid the use of gelatin from specific animal sources, and medical issues may limit or prevent its consumption by certain people.

Gelatine sets firm when cold and melts completely at 35°C.

The effect of commonly used ingredients on the setting point of gelatin

There are a few everyday ingredients that can influence the setting point of gelatine.  

  • Milk and dairy products strengthen the gelling process and support it’s structure.
  • Salt lowers its strength and can cause the collapse of the structure or in some cases prevent its setting, all this can be counteracted by increasing the amount of gelatine used.
  • Sugars increase its strength with the exception of fructose found in fruits
  • Acids such as vinegar, fruit juice and wine with a pH below 4 produces a weaker jelly and requires the amount to be used to be increased by up to 1/3 of the original amount.
  • Strong acids and tannins in red wine and tea can make a jelly set with gelatine go cloudy. Cloudiness can be prevented by cooking the tannin-rich ingredient and gelatine solution together briefly, about a minute or two. The jellies can also benefit from being passed through a muslin cloth or in some cases even being clarified.
  • Pineapple, papaya, melon and kiwi fruit all contain protein-digesting enzymes that break gelatine down and prevent it from setting. You can deactivate these destructive enzymes by cooking the fruits and turning the fruit into a puree or cook the extracted juices to create a clear jelly.
How to Use Leaf Gelatin

All leaf gelatine must be adequately soaked before using, regardless of the brand, strength or size.  This soaking method is called blooming.  So if your recipe states ” to bloom” it means to soak the gelatine till it’s rehydrated. 

You must always soak leaf gelatine in cold water, as anything less than cold may interfere with the blooming stage.

  • Place the leaf or leaves in a suitably sized flat container. If you soak more than one sheet make sure you separate them by wiggling them about in the water.  If they stick together they will not soak properly, and their use will be diminished.
  • Pour enough cold water over the gelatine to ensure it’s completely covered.
  • Leave to soak until the gelatin blooms (expands) and goes wrinkly, this typically takes about 5 – 6 minutes depending on the quantity. If you soak numerous sheets, it may take longer.
  • Do not leave the gelatine in the water too long, it will start to break down, and you will not be able to use it in the correct amounts if it begins to disintegrate.
  • Once bloomed the gelatine is ready to be used, remove the gelatine from the water and squeeze it between your fingers to remove any excess water.
  • Melt the gelatin by adding it to the warm liquid that it is to be added to; the liquid temperature must be over 35°C.
  • Once the liquid is cooled below 4°C, the gelatine will set and become firm. You can melt the gelatine and re-set it for the second and third time by bringing the liquid back to over 35°C and then set it again at below 4°C
How to Use Bronze Commercial Gelatin

For commercial use, I recommend and only use bronze leaf gelatine.

I have devised a simple formula to give you an indication of how much to use. Please remember these are only guidelines and always test small amounts by chilling 100 ml of your mixture to check how firm it sets. I normally pop a small amount in a small flat bowl and chill it quickly in the freezer, this way I can add a bit more or let it down if it does not set to my liking.

The formula for Bronze Gelatin Sheets
  •     1 sheet of bronze for 100 ml liquid = soft set (easy to turn out)
  •     1 sheet of bronze for 125 ml liquid = wobbly soft set (served in a glass)
How to Use Domestic Small Gelatin Leaves – Platinum Grade

The small sheets that you buy from most supermarkets and delis in the UK are made by G.Costa or Super Cook.  These are Select Platinum Grade, and the strength differs slightly to the bronze commercial larger sheets.

  •     1 small platinum sheet for 100 ml liquid = soft set (easy to turn out)
  •     1 small platinum sheet for 125 ml liquid = wobbly set (serve in a glass)
Conversions for powder gelatin to leaves
  •     1 level teaspoon of powder = 1½ small leaves
  •     3 level teaspoons of powder = 3 small leaves
  •     6 level teaspoons of powder = 6 small leaves

I conclude that there is no difference between commercial bronze and domestic platinum gelatine. I found from my test that the bronze product has a “bronze/ yellow” colour whereas the platinum was bright and almost colourless. My personal preference is to use leaf gelatine rather than the powdered version.

Remember that gelatine is not suitable for vegetarians nor certain religious diets.  I recommend using veggie gel or agar agar which are both suitable for vegetarians and vegans.  I will write another post covering agar agar as there are some important rules to follow for its successful use.

If you would like me to write about any other specialist ingredients, please let me know, and I will investigate and share my findings.

Myths About Gelatin

My mother used to give me gelatine supplements; she believed it would strengthen my hair and nails. Well, the truth is that there is no medical or scientific evidence to confirm that gelatine supplements have a direct link to the strengthening of hair and nails. In other words, it’s a myth.

What we do know is that nails and hair are made of a protein called keratin and gelatine is not a building block for keratin proteins.


Read more:

and here is more if you feel the need. 😉


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