Break about 100g of white chocolate into pieces and put it into a saucepan. Place on a very low heat (or you can use a bain marie if you prefer) and melt the chocolate, stirring constantly until it reaches 45ºC.
Remove it from the heat and pour the chocolate into a bowl.
You want to bring the temperature down to 32ºC, and you’ll do this by adding a piece of unmelted chocolate and stirring it in until it has melted.
Keep adding more chocolate and stirring until the temperature reaches 32ºC.
Once you’ve reached the desired temperature, remove any lumps and pop them into the saucepan (you need to melt more chocolate later for the base of the chocolates).
Carefully pour the chocolate into the mould, fill each of the holes with chocolate and then tip the mould over the bowl to pour out any excess. You should be left with a thin layer of white chocolate around in each hole in the mould. If there are any bits missing chocolate, then add a little more into that hole and again tip out the excess.
Place the mould on a large sheet of greaseproof paper and use a large knife to scrape over the top of the mould to remove any excess. You’ll find that this will fill some of the holes back up a bit again, so you’ll need to tip it over the bowl again and then scrape again to get everything neat and tidy.
Put your mould into the fridge for the chocolate to set.
Scrape any leftover melted chocolate in the bowl back into the saucepan to melt again later.