Cane sugar is added to a thick-bottomed pot and melted into caramel over medium-high heat (be careful not to burn it)

When the cane sugar has turned into caramel and is nice and brown, add the vinegar and reduce to medium heat

When it has boiled down to about 2.5 dl in total (takes about 10 min), it is done.

It should have the same consistency as honey when it cools. If it has become too thick, you can reboil it with a little water, or boil it down again if it is not thick enough.