Both caramel and butterscotch mixes are illusive. I spent a few years developing mine with many many tweaks along the way. In fact I still tweak things here and there.
In my experience...
1) You will not find one single caramel that provides a robust caramel flavor. What is lacking in one will be found in another. Same with butterscotch flavors. Making a convincing butterscotch, or caramel, vape requires using a few of each in a mix.
2) Caramel needs the help of butterscotch in order to be convincing. Likewise butterscotch needs the help of caramel to be convincing.
3) Caramel, or butterscotch, need help from creams and vanilla.
Here are my basic Caramel, and Butterscotch, recipes with some notes.
Butterscotch:
FW Butterscotch Ripple 3.5%
FA Butterscotch 2%
FW Natural Butterscotch 1%
FA Caramel 1%
FA Madagascar (Vanilla Classic) 3% (3.5%-4% for more vanilla flavor)
FA Vienna Cream 0.75%
FLV Cream 0.5% (1% for more of a creaminess)
Caramel:
FA Caramel 1%-2%
FW Caramel Candy 1%-1.5%
FW Butterscotch Ripple 3.5%
FA Butterscotch 2%
FA Madagascar (Vanilla Classic) 3% (3.5%-4% for more vanilla flavor)
FA Vienna Cream 0.75%
FLV Cream 0.5% (1% for more of a creaminess)
Suggested steep time = 3-4 weeks. The longer you let it steep the better.
I have several variations of the above recipes that I've developed over the years. The ones that are in
@Zazie's Blog are good, but older. Improvements have been made since those were posted.
To make either more sweet increase Vienna Cream to 1%-1.5%. Warning, doing so will make either mix much sweeter. For a less sweeter mix decrease Vienna Cream to 0.25%-0.5%. It will not need any sweetener as caramel, and/or, butterscotch are sweet 'as is'. The creams and vanilla also lend some natural sweetness to the mix.
Also worth noting, there is a natural buttery note in most caramel and butterscotch flavors. If you want more of a buttery note, add FA Walnut at 0.25% - 0.5%. The walnut will produce a 'butter like effect'. At those %'s it will not add a noticeable nut flavor.
If you want just a plain caramel or butterscotch juice make it as above. If you want a base then add FA Cookie 0.5%-1% or INW Biscuit 0.5%-1%. You could use a cake for that too. Like a white or yellow cake at 2%-3%.
I would make the caramel 'as is' so you experience the mix as intended. YMMV
Here are the caramels I've found to be most accurate and the ones I use the most. I've nearly tried them all (same with the butterscotch flavors).
FA Caramel - it's a Euro style caramel
INW Caramel - very dark Euro caramel, and strong
MF Caramel - most like American caramels (not dark)
FW Caramel Candy - I do not consider this to be 'candy'
FW Salted Caramel
FLV Caramel
@NolaMel and
@Skeebo have sampled my butterscotch and caramel mixes. Hopefully they will share their thoughts.
Good luck