I found the amaretto overpowering the first time I made this so the next time, I used 5 ml amaretto and 10 ml frangelico hazelnut liqueur and it was absolutely perfect. Still had the nuttiness you want but much rounder and actually to my mind, closer to the taste of toblerone.

I just used aged rum (Appleton specifically) and the result was truly wonderful. I genuinely feel it can be better than the vanilla infused rum. And yes, it tastes quite Toblerone-y and I think it's the combination of Amaretto and cream, plus the barrel aspects of the aged rum. Even the honey contributed some deep richness which I think can be used more in other creamy cocktails.

Didn't have amaretto used homemade vanilla extract and it was fantastic.

I had a okay around with this, firstly because I forgot to separate the white and yolk (was making flips last night!) and as I had a bottle of Krupnik, used that instead of rum and honey but matched their measurements. If anything using Krupnik made it taste smoother. But it still tasted just as good. I would say a wee bit better. Worth the experiment.