Simmering sugar with cream creates a rich, flavorful caramel. This 'wet' method is mostly hands-off but needs close attention—caramel can quickly shift from golden to burnt. Remove it from heat just before it hits your ideal color, as it keeps cooking off the stove. To stop the process instantly, use an ice bath.
In a saucepan, whisk together the cream, sugar, butter, and vanilla, if using, over medium heat. Lightly slosh the liquid around the pan as it dissolves, then avoid stirring the solution once it comes to the boil.
Maintain a simmer to keep it gently bubbling for 10-15 minutes, until the caramel turns from a light blonde to brown – don’t make it too dark! – and begins to thicken.
Notes
Keep the caramel in a jar in the fridge for up to a month. Gently reheat and give it a good stir before using.