One problem I have found when I am eating jelly in the dark, is that I often lose it mid-meal. NO MORE! With my trusty UV light I now have the power to seek out my jelly in the dark, and devour it, wobble by luminous wobble. This can be achieved by switching out the main bulk of the water in regular jelly to tonic water, which fluoresces under UV light due to the quinine in it. The flavour is new and open to modification, however I stuck to just a plain sweetened tonic water jelly for simplicity's sake. The recipe also works if you switch sachet gelatin for the flavoured cubes, like Hartley's, but as before I didn't do this.

Step 1: What Do You Need?

You will need:

A measuring jug
A whisk
A sachet of gelatin
Lemon juice
Sugar
Some boiling water
And, of course, tonic water!

Step 2: Prepare Your Gelatin!

The basics of this are that you take your boiling water, put it in a jug, pour the gelatin over it and whisk until it dissolves. However, directions of use vary from packet to packet, so following the ones that apply to you will achieve the best results. For example, using my Dr. Oetker Gelatin, I needed to add one sachet of my gelatin to 180ml of boiling water and stir until completely dissolved. If the gelatin clumps and won't dissolve, place your jug over a pan of boiling water and stir until it finally dissolves. It should hopefully look as pictured.

Step 3: Tonic Water Time

The basics of this step are that you make up the rest of the jelly solution with tonic water, as opposed to water. Again, the volume of tonic water you add depends on the brand/type of gelatin, but for mine I filled it up to a pint. Give the solution a stir to ensure even distribution, and don't mind the bubbles as they do go away. However it is probably sensible to stop whisking if the bubbles threaten to spill over the sides of the jug!

Step 4: Fun With Flavours

At this point you will want to add about a tablespoon of sugar and half a tablespoon of lemon juice. This will take away a bit of the harsh bite in the tonic water, so the taste fits with the smooth jelly texture. Stir until the sugar completely dissolves. Now you have your completed jelly solution!

Step 5: Split the Mix

Split your solution between however many individual vessels, or into one large mould. One minor point is that the fluorescence is the main attraction of this treat, so a clear container or turning out the jelly would be best. Then put the jelly in the fridge to set for 4-5 hours, until set and wobbly.

Step 6: Done!

Now you should have a delicious jelly that glows under a UV light. This could be good for Halloween, general parties or simply to impress people with your magical fluorescent powers!