Monthly Archives: February 2015

Sous Vide Caramelisation & Caramelised Onions

I spent a long time looking for answers regarding long, slow cooking of sugars to create caramelisation. A few years ago I tried making caramelised onions in SV bags, by placing the bags in simmering water rather than using a specific time and temperature. I assumed the higher the temperature the better, though I’m sure you’d find some interesting flavours in other temperature zones.

This method obviously works, and I’ve seen a few posts online recently that offer similar ideas, such as making dulce de leche from canned condensed milk, or suggestions of making black garlic using sous vide.

Here’s the results of my little experiment, each picture is about 8 hours apart. I initially sweated the onions off till translucent to make them easier to vac.

So after approximately 24 hours at approximately 95 degrees celcius, the onions were sweet, caramelised, and quite runny compared to a similar product produced in a pot. This would be a perfect base for making a gel or similar preparation. Next time I would try a few other things, like adding some milk powder or baking soda to change the nature of the caramelisation to a maillard reaction.

I’d be very interested in hearing from people who have tried similar ingredients to see if we can find some more interesting ingredients that might benefit from this style of preparation.

Preventing Evaporation for Extended Sous Vide Cooking

I see a lot of people asking online about preventing evaporation, with lot of suggestions ranging from expensive polystyrene balls, custom cut cambro tank lids to just “keeping the water topped up”. I just thought I’d post my method, which only uses plastic wrap, so it’s probably the easiest and most accessible but also very effective. We often cook for 36 hours like this and never had to top up water or had evaporation / condensation problems. I imagine it also traps some heat to save a little power too.

First, fill your tank / pot / etc do the required level depending on your circulator. Add your bagged food so you know the level is correct before you seal it up.

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Then, seal the entire container with plastic wrap, overlapping a few times so that it’s fitted firmly and down the sides enough that it won’t slip later. I find three layers is adequate.

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Cut a small hole that barely fits your circulator. Hold it’s base against the plastic till you can judge it by eye. Be careful not to slice into any bags.

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Slide the circulator in and fasten. If you’ve been careful it’ll be a snug fit, which is perfect.
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Turn it on and start your cook. It’s also handy to write the time / temp on the plastic if it helps you remember when to take it off.

Sous Vide Time and Temps Android App

I’ve seen smartphone apps for sous vide cooking mentioned before, but until now never actually downloaded or tried one. Previously of course, they’ve all been iphone apps, and I’ve been an Android user for about 5 years now. I stumbled across this app from CookingSousVide.com today, and I’m familiar with Jason’s work, so downloaded it for a look. It’s $1.99 USD, which I thought was a little steep for such a simple app, but considering the leg work that’s gone into the research I’d say it’s a fair price. It’s hard to find this many times and temperatures collected together, and having on my phone might come in handy.

Here’s the main menu screen:

sous-vide-time-and-temps-android-app-menu

It’s all pretty simple, with each individual cut divided amongst the type of food to be cooked.

For what it’s worth, I’m testing on a Samsung Galaxy S4 and the performance of the app is perfect – displays clearly, easy to navigate and easy to use. There are plenty of links in the app leading back to the website too, for extra information.

There are some obvious bugs though, the app feels like it was taken from iphone and recreated for android, as the back button on my phone only exits the app, no matter what level of menu or page I’m viewing, and you have to use the back button in the top left of the app’s screen to navigate – this is extremely annoying. There’s an option to save items to a favourites list, but when clicking “add” I only get taken to the favourites list, with no other way of adding an item to the list. There’s also a ‘notes’ section on each page, but on my phone the ‘save notes’ button doesn’t operate and I can’t use it. It’s a shame these obvious errors haven’t been corrected.

Here’s a sample of a particular item in the app:

I haven’t spent a lot of time checking the accuracy of temperatures suggested or fully exploring all the pages of the app. What I’ve read of the information on various pages is all sound advice, similar to what you’ll find in the books from the same author. Given how much time it often takes to find sous vide cooking times and advice online this is a great quick reference guide.

The app itself needs some work to remove the bugs I’ve noticed, though hopefully improvements will come in future generations.

Read more over at http://www.cookingsousvide.com/ for the author’s website.

iPhone/iPad etc – https://itunes.apple.com/us/app/sous-vide/id388460050?mt=8

Android – https://play.google.com/store/apps/details?id=com.cookingsousvide.sousvide

Cryovac Compressed Cucumber

A great way to demonstrate the versatility and usefulness of the chamber cryovac machine is to try some very simple and inexpensive preparations that will allow you to achieve interesting textures and tastes that are otherwise impossible. One of the first I personally tried was compressed cucumber, something that ended up on the restaurant menu as a great alternate texture for the same fresh taste.

Compressing fruit and vegetables in a chamber cryovac makes the flesh more dense and somewhat more flexible, giving the added impression of being more juicy. Cell walls are broken and the structure of the product changes in a way that’s difficult to describe without actually touching and tasting.

Here’s my method and a sample plated amuse buche I served recently:  First, peel your cucumber carefully, taking off a very fine layer of skin and leaving the slightly greener layer of flesh underneath. Cut into sections about 10cm long, then turn on it’s end and quarter. Using a thin blade remove the seeds and you should be left with a flat bar about 10cm x 4cm about 5mm deep.

Next, season the cucumber flesh. I used a tiny pinch of sea salt and a sprinkle of both dehydrated celery leaf and cucumber skin. They help impart a stronger flavour and look fantastic. To make, simply place celery leaves and cucumber skin in a dehydrator. Once dry, blitz into a fine powder using a spice grinder.

Lastly, lay flat in a cryovac bag as big as your machine will take. Add a dash of rice wine vinegar to create a slightly pickled flavour. Cryovac on your machine’s highest setting, and leave to infuse for a few hours in the fridge. Once ready to use just trim any soft or flimsy edges to make a more uniform serve.
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Play with different pressures and times and you’ll discover more interesting textures. I prefer to vac on 8 out of ten for a slightly crunchy strip. You can vac multiple times to create an even softer texture.

Here’s one of our first uses of compressed cucumber, an amuse buche of cucumber, cold smoked and sous vide ocean trout, Greek yoghurt and coriander.

compressed-cucumber-amuse-buche

Grant SV200 Commercial Circulator Review

It’s been almost a year now since I started using the Grant SV200 Circulator and it’s been a reliable performer for probably thousands of hours already, getting used on a daily basis for the preparation of a wide variety of menu items. While the kitchen isn’t big enough to allow it’s use during service it’s certainly made our prep time more efficient.

This particular model cost a touch under  $1500 including shipping from Ecotel in South Australia. That worked out cheaper than any other major brand circulator, and was very cheap considering most circulators can’t even be imported direct for that price.

Grant’s official website has the full run down of specifications and benefits of use: http://www.grantsousvide.com/products/universal-stirred-heater/ but here’s the product information you need to know about most:

  • ± 0.5°C Accuracy,
  • Temperature Range Ambient + 5ºC – 99.9ºC
  • 50 Litres Capacity,
  • Stainless steel contruction,
  • Programmable with three pre-set temperatures
  • 1.3kW Heating element,
  • Available in 120 or 240 volt Power,
  • One year Guarantee.

Here’s our device, heating up to 65°C, you can see the orange “heating” indicator light on the top left of the unit.

grant-sv200-commercial-circulator

Grant seems to be more popular for it’s unstirred water baths, we opted for a circulator simply because we believe they provide more even heating and are more adaptable, being able to use a variety of containers depending on the size of the job and space available.

Although I’ve only used a few circulators in a professional environment, small details in design and performance make you appreciate the quality and finish of such a machine, and for me, this includes:

  • Wide and secure screw fitting for use on a variety of pots or containers
  • Unpluggable cord for easier cleaning and storage
  • Simple interface  with clear display
  • Ease of use – a simple dial and two buttons
  • Sturdy construction
  • Removable cage and fitting for easy cleaning

It might seem simple but people often overlook these things and anyone who’s worked in a commercial kitchen understands that any equipment needs to be simple to use, as many people might need to use the machine and it’s difficult to train new staff consistently.

So in my opinion the Grant SV200 is everything a chef needs in a compact circulator, with all the required features while maintaining ease of use. I’ve never found an issue to complain of, and if I was to purchase another circulator I would almost certainly buy another.

Affordable Sous Vide: Nomiku

For those of us wising to sous vide at home, the prohibitive cost of equipment often makes it difficult to achieve professional results. There are dozens of options for hacked, DIY or other unreliable ways to cook sous vide, but none will ever be as easy as using a well designed circulator. There have also been many companies offering cheap solutions for home users, usually involving a PID controller to be used in conjunction with a rice cooker or slower cooker.

Nomiku Sous Vide Circulator

Vimeo Video of the Nomiku Introduction

Nomiku hopes to change all that by offering a simple to use, cheap home circulator. I first saw Nomiku pop up on Kickstarter some months ago, and it quickly reached it’s backing goal, promising an affordable circulator for home use. The fact it was backed so quickly on Kickstarter shows the interest people have in sous vide at home, and obviously with the Nomiku becoming available in December 2012 there’s a new wave of home cooks who will be able to use it.

Nomiku’s Kick Starter Page shows their plans for the device, a compact, affordable, easy to use sous vide circulator. The creators are the same people that offered DIY printed PCB plans and kits for sous vide on the internet a few years ago, and are still available at Lower East Kitchen. They also have a sous vide recipe site, so it’s obvious they’re big fans of the technology and will be available in the future.

Current information, release dates, and a few FAQ’s are available at Nomiku.com, but I can sum up the important facts about the machine fairly quickly:

  • 0.2°C Accuracy, 0.1°C Stability,
  • 5 Gallon (19 Litres) Capacity,
  • 750Watt Heating element,
  • Circulation Pump 10Litres/Minute,
  • 110 or 240v version available,
  • Can be set in Celsius and Fahrenheit.

Considering how cheap it is, it’s compact design and being backed by a passionate team of developers, I’m very excited about this machine and I am certain I’ll have one arriving sometime towards the end of the year !