Load yourself with patience because you're going to need 10 days for this recipe. Firstly, make the caramel from the sugar. Use a coffee pot to make it easier. Put sugar and a few drops of water in it.
The caramel needs to be golden brown but be careful not to burn it! "Bake" the sugar on low heat to prevent this. This way you can react in time.
It's difficult for sugar to melt in alcohol but after five days it does. Then put 2 egg yolks in a large glass or enamel bowl, stir well and add half the cream. Before you open it, however, the package must be well shaken.
Mix again, add the condensed milk and instant coffee dissolved in a spoon of water.
Add the rest of the alcohol and stir. Transfer into a 6 1/5 cups (1.5 liter) bottle and leave it to rest in a cold place for five days.
Then transfer it into beautiful bottles. Some prefer it with a cube of ice in the glass. I prefer it in a larger glass filled to the brim.