Cloning "Duchess Reserve"

February 21, 2016 Mr. Hardwick


One of the juices recently that grabbed my attention was Kings Crest - Duchess reserve.

It's delicious (and expensive!) caramel / butterscotch tres leches cake with a lot of depth. It is however very sweet - which I don't like - so hopefully the clone can retain everything I liked about the original but with less of that over-the-top sweetness.

So instead of staring longingly at an ever diminishing bottle, I've decided to take this one on and see if I can clone it, or come close to the profile.

I'll probably break this up into several posts as I go, definitely haven't nailed the recipe yet but I feel like I'm on the right track.

So for starters the first flavour I recognize is FW Hazelnut.

This flavour is pretty prominent in the mix, and adds a rich, nutty flavour and texture to the "cake"

The second flavour I'm picking up is some kind of caramel or butterscotch, maybe TFA caramel or FW butterscotch.
I'm leaning towards mostly FW flavourings at this point.

Now the third flavour I get, and the clue is also in the flavour profile - is FW tres leches.
This is a great milky flavour with hints of cakeyness and I'm guessing it's the foundation of this recipe along with the Hazelnut.

I think there might be some kind of custard note in there as well, so for this I'm going to lean on the old classic CAP VC1

Creative Commons License
This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.

Reserved Duchess v2.7:

  • FW Hazelnut 1.5%
  • FW Tres Leches 2%
  • FW Butterscotch Natural 2%
  • FW Marshmallow 0.5%
  • FW Butter Pecan 1%
  • CAP Vanilla Custard V1 3%
  • FA Meringue - 0.75%
  • TFA Sweetener 1.5%
Steep: 1 week minimum, 2 weeks or longer best.

Tres Leches contains ethanol and needs a good steep. 1 week minimum. Try vaping it before and you'll not be pleased with the taste - trust me on this.
No amount of ultrasonic / heat / speed steeping / praying to aliens is going to help here.

Mix it up, put it aside for a week or longer and come back to it.

It's not as sweet as the original and overall percentages may be a bit low, since FW often requires higher percentages to really pop.

I'm pretty sure there's also an obscene amount of sucralose in the original, after testing I feel that the tres leches benefits from the addition of sweetener, I recommend starting with 1-2% sweetener.

So that's it for now. I'd love some feedback and comments.
Try it out and let me know your thoughts!

Seeya after the steep ;-)

Mr. Hardwick


Like many FW flavours, some of these flavouring contain ethanol or acetoin and other diketones. Please consider this before mixing with these ingredients and vape responsibly.

PS - This recipe is free for personal non-commercial use.


Update: 27/10/2016

Another update - I'm now fairly sure the majority of the cookie/cake flavour is coming from the tres leches, so I have removed the sugar cookie.
The updated recipe is now even closer.

The addition of FW marshmallow boosts the sweetness and rounds things out nicely.

Update: 13/02/2017

Well I'm still not there with this recipe yet, it has certain characteristics that are quite close, but I'm missing some key element, haven't had a chance to go back to it since the last mix but will keep updating!

Update: 18/02/2017

Added meringue & butter pecan after a suggestion from MrColdOne (Mike Peifer) which took this recipe to the next level. All future updates to this recipe can be found here:


  • Huffapuff

    Apr 21, 2017

    Hey Mr Hardwick, would there be a big difference if I was to use FW Butterscotch as opposed to FW Butterscotch Natural?

  • FAbrizio

    Mar 22, 2017

    After 21 day I have vape this juice. The flavor is really same as the originale. But it is not dense as the original Duchess Reserve. Now I have make another 100ml the juice and I will wait 1 month after to vape. I hope it will be more dense if I wait one month of rest with a new percentage that you have write.

  • Mike PEifer

    Feb 14, 2017

    I made this recipe exactly as posted and let it steep for 9 days. It was close as you said but wasn’t quite there with the sweetness. I added .5 FW Butter Pecan and I honestly can’t tell the difference between the real deal and this. I’m thinking it’s damn close now!

  • Paul

    Jan 25, 2017

    Hi, I’d like to try this recipe, but you wrote:

    “It’s not as sweet as the original and overall percentages may be a bit low, since FW often requires higher percentages to really pop”.

    How can I improve it to make it as sweet as the original?
    Thanks Man, it’s very useful!

  • Mr. hardwick

    Sep 29, 2016

    Herco – The post is always updated with the latest version.

    Craig – latest version is pretty tasty, I dropped the % of FW Butterscotch as it’s actually a lot stronger than it seems at first ;-)

Leave a comment

Please note, comments must be approved before they are published