Pour in sugar and water into a small pot and turn the heat to medium. Do not stir!
The sugar will start melting and bubbles will start to appear. Be patient, don't stir.
The sugar will slowly turn light brown. At this point, swirl the pot a bit. It should take about 10 minutes depending on your stove
Keep cooking the sugar and swirl the pot occasionally until the sugar mixture turns into honey colour.
Pour a bit of warm whipping cream into the pot while stirring vigorously with a whisk. Be careful it might splatter.
Add the remaining whipping cream little by little while whisking
Take the caramel off the heat, add the butter, whisk until it's fully melted.
Pour into a clean glass jar. Let it cool before putting into the fridge