6 days is the minimum, I haven't tested this for a longer steep yet, but it is delicious at 6 days.
This is a Sugar Cookie with a creamy Keylime Icing. The Cookie layer is soft in the middle and crispy outer layer. So far, the recipe is very well balanced. The Limes are bright and sweet, so far no fading. They got deeper and more prominent over this initial steep. The Custard adds that smooth icing effect and a touch of Vanilla.
I will be making a bottle to steep for a few weeks to see if it holds up, but at 6 days, it is very, very good.
Check diyvaporsupply if you dont have the flavors.
Tested in my normal set-up: Steam Crave Supreme v2, dual SS Claptons 4 wraps, 0.13ohm, 70 watts. Rayon wicks.