
Heat a small pot over low heat.
Add the brown sugar and stir until the sugar melts.
When the sugar becomes frothy and turns from light brown to dark brown, carefully add boiling water a little at a time while stirring. Do not let the sugar turn too black, as you will end up with bitter-tasting browning sauce. Note: Be very careful when adding the hot water as the sugar may sputter and rise up.
Keep stirring for about 5 minutes until your sauce is ready.
Remove from the heat and set aside to cool.
Use immediately or bottle and store in the fridge.