Tips and ideas:
The sauce can be flavored with vanilla or chopped mint.
You can serve the sauce warm, but also cold. If you want to serve it cold, it's a good idea to whisk it until cool. I usually place the pot in the kitchen sink with cold water and whisk the sauce until it is cool. It can then easily keep until the next day in the fridge. ????
If you don't have a blowtorch available, just skip burning the sauce. ?