ragebutt

joined 5 months ago
[–] [email protected] 18 points 7 hours ago (1 children)

I thought it was some dumb attempt at thermal management like “oh when you paint roofs white it lowers electricity bills because the heat from the sun can’t go in as good so if I paint my laptop black it’ll be cooler because the heat from the inside will go out better, maybe”

Like just some real dumb shit like that, but nope, racism

[–] [email protected] 3 points 7 hours ago (2 children)

Can you reference the history?

Not doubting, just wondering, and not finding much online.

My knowledge here is that fluid gels are credited to Norton and Campbell out of Leeds university. Not necessarily for culinary applications but just the concept as a whole, largely in part because gellan was new at the time, and their work was more geared towards pharmaceuticals and cosmetics than culinary applications. It wasn’t until people like Ferran Adria and Heston blumenthal (and their development chefs like chris young) read their papers that it reached the culinary world and became a wildly overused technique

My understanding is that prior to their work “A molecular view of the gelation of agarose” in 1999 there aren’t really any papers describing fluid gels at all and their work leading up to said paper was the hallmark here. Prior to this there was gels like lbg+xanthan, which can be made a fluid gel, but with far more effort and generally will be a thixotropic gel

[–] [email protected] 4 points 8 hours ago (4 children)

Fair point. The reason I used the phrase “invented the technique” is not to imply that he invented fluid gels (that was Norton and Campbell) but to imply he invented this recipe, which refined the idea of fluid gels (relatively shortly after their discovery in the early to mid 90s) to manage viscosity to the point that 2 opposing gels could be held in a cup vertically.

That said semantics are important so good point

[–] [email protected] 7 points 9 hours ago

That should be fine. It sets basically the same as jello would. Unless they’re like licking it or something

And actually agitating it during the setting may be beneficial. I’ve never played around with this but the whole idea behind this is a gel structure that is broken. That’s why ideally you have an automatic stirrer during the ice bath portion to continually agitate the mixture as it cools. But I’ve made this 4 times now and had the gels come out to varying degrees of hardness after refrigeration because of varying levels of calcium. Sometimes it comes out fairly liquid, sometimes it comes out basically like gelatin, but every time it has been successful.

[–] [email protected] 1 points 9 hours ago (1 children)

My superpower is wall of text, no worries. And Chris young is brilliant so making his channel more obvious is only a good thing (though I wish he would do more novel stuff instead of rehashing old fat duck and chefsteps stuff to have an excuse to plug his new thermometer company but I digress)

The pet sheeting is an interesting idea. It’s a similar issue to the gellan dividers chris uses - I often forget about the dividers until the last minute. So then aluminum foil to the rescue, haha

Also fwiw I would not suggest serving this in a big cup. The scale may not be clear bc of the image but this cup is a bit bigger than a shot glass. The gel modifies the texture of the tea and makes it thicker by a bit, kind of like when you use those thickening agents for people with dysphagia but not as severely (same principle). With a large glass you might start to notice the odd texture a bit more, whereas with a small glass like this it’s mainly that you’re so overwhelmed by the differing temperatures occurring at the same time that the texture is secondary. You notice it but not as much.

Told you wall of text is my superpower

[–] [email protected] 2 points 9 hours ago (9 children)

It’s literally this

Chris young invented the technique haha

87
Hydrocolloid tea (lemmy.dbzer0.com)
 

A small glass of tea made with fluid gels. An interesting effect of gels is that when you shear them into small pieces they want to hold back into a gel structure but at the same time they take on a delicate fluid like state. This recipe takes advantage of this effect by pushing this effect to its limit: when it is at rest the two gels are independent and held up against each other with no barrier in the glass. They are strong enough that lifting the glass will not ruin the effect. However, tilting the glass will and they will flow like a liquid.

Additionally this is a vegan recipe as the gel is based on gellan, a gelling agent derived from sphingomonas elodea, a bacteria derived from lily pond water.

One side dyed in the picture to show the effect but here is another picture of another preparation:

tea

This is 2 gels in the same glass held against each other. Think of the snack pack

The layers in that stay separated. This follows the same concept. But in the tea glass instead of using colors to differentiate the layers the layers are differentiated by temperature.

This results in a small glass of tea where you have both hot tea and iced tea. When you drink it both sensations hit your tongue and mouth at the same time. It’s quite confusing and very interesting

This recipe was created by chris young, who was working for Heston blumenthal at the fat duck.

It is labor intensive and takes some effort but if you want to surprise your guests this 100% will do it.

Hot and iced tea:
Tea infusion: 1.8kg low calcium water: the water should have between 100-400 ppm calcium. Too much and the gel will be lumpy. Too little and it will not set. I use Evian, which is about 80ppm, and add 36mg calcium chloride. You will use calcium chloride later so this isn’t a waste. You don’t need to measure super precisely because this just brings you up to the lower limit of 100ppm for the 1.8kg (however you may want to make much less)
40g tea
Cold infuse the tea in the water - this part is easy. Put the tea leaves in the water and wait. Infuse for at least one hour but not too long. Taste and make sure bitter notes aren’t infusing. 1 hour is often enough.
Strain the mixture. - strain it through a fine sieve lined with a coffee filter. You want it super clear.

Now comes the more difficult part

Hot tea
Part A:
860g tea infusion
80g ultrafine sugar (caster, superfine, bakers sugar) 0.6g gellan F 0.6g sodium citrate

Part b:
0.25g calcium chloride
1g malic acid
5g tea infusion

Prepare ice bath

Bring tea infusion to a simmer. Dry blend part A. Whisk in until dissolved. Mix part B. Once part A is simmering remove from heat, add part b, whisk in, place over ice bath, continue whisking as long as you can, ideally until cool. If you have an automated stirrer that’s the best.

Refrigerate 24 hours then pass through a very fine sieve (I use a 250um lab sieve) then bottle in a squirt bottle (like a condiment bottle).

Cold tea:
Part A:
860g tea infusion
80g ultrafine sugar (caster, superfine, bakers sugar) 0.6g gellan F 0.6g sodium citrate

Part b:
0.25g calcium chloride
3.5g malic acid
5g tea infusion

Prepare ice bath

Do the same exact preparation.

To serve:

Prepare the hot tea: you can either put it in a water bath if you have a sous vide at 162F, or you can microwave it until it’s hot enough, or you can put it in simmering water, etc. the first is the easiest but obviously you need the equipment. The microwave works in a pinch, just shake it up, taste test, go in small increments to make sure you’re not serving lava.

For the glass you need a divider. I use aluminum foil formed to the glass. This doesn’t give the cleanest line as shown in the dyed preparation. In the hot/cold one it doesn’t really matter. In chris youngs video where he does this with coffee he does reveal that he simply made a divider with more gellan to fit the glass. Simple. He doesn’t reveal the recipe though, nor the adaptations to make it work with coffee (there’s also a mulled wine version they served at least once at the fat duck). Youtubers always assume their audience is dumb or maybe he needs hestons permission to release the recipe, I dunno.

Once you have the hot heated up and the divider you’re ready to go. There’s a technique to this but it’s not terribly hard. Basically pour each side evenly then pull the divider out smoothly and as straight up as possible. Try to make the divider as thin as possible. From here serve as quickly as possible because the hot and cold sides will cool and heat each other. Even a few minutes will have you just serving a weird thick glass of tea.

But if you get it right you serve a glass of tea that look almost entirely normal. There is a slight difference in each side, one is slightly darker, but it is very subtle. I specifically use a glass with a handle because if you grab the glass it totally gives it away.

[–] [email protected] 5 points 11 hours ago (1 children)

In the fridge this should keep 2-3 months especially if you follow safe practices like sanitizing the jar and lid for storage

If the crisp is submerged in oil, cooked thoroughly till dry and crispy, and it’s stored in the fridge the risk of botulism is extremely low.

You are correct that it’s not 0 though. Tbf it never is. To make it safer and extend shelf life you can add an acid at the end like 1-2tbsp black vinegar or rice vinegar after cooking. This will adjust pH enough to inhibit botulism spores further but again the risk still isn’t 0

[–] [email protected] 3 points 12 hours ago

arctic on ios

I suppose the app respects its own formatting but that is kind of frustrating for literally everyone else on lemmy. Nice app though

[–] [email protected] 4 points 14 hours ago (2 children)

Do they not show up? I’m using mobile and the formatting appears correct

Good to know though, thanks!

[–] [email protected] 6 points 16 hours ago (7 children)

Looks very solid. I will forever be a NY pizza diehard but I can respect a well made pizza with a good undercarriage even if it’s not my style. Besides that, any pizza with no flop looks good to me

Diastatic malt powder can also be added to potato purée to make it much, much, much easier to process

Joel Robuchon’s probably one of the most decorated chefs in the world and everyone should make his pomme purée at least once. It is absolutely incredible and everyone should try it at least once. It is easy, yet difficult, because it is labor intensive. The abridged version is essentially:

boil mashing potatoes (like Yukon gold, depends on where you’re from though, that’s a USA variety)for a half hour mash with something like a food mill or ricer if available. Not strictly necessary but makes the next step easier Heat on pot to evaporate excess moisture Pass purée through very fine sieve - absolute pain but essential step, the finer the sieve the better. I have a 250um lab sieve that I use for this and it’s amazing Back in pot, whisk in cold butter, up to 50% of the weight of the potatoes (robuchon uses 50%), whisk constantly once emulsified Add hot milk to reach desired texture Season with salt to taste and optionally with white pepper

This is obviously labor intensive but it’s an absolute dream texturally. The potatoes are so smooth. An incredible experience that makes me go through this nightmare of a process 2-3x a year because it’s worthwhile, an amazing textural experience and flavor

Anyone who has ever tried to over process potato mash knows that they turn into glue almost immediately. Robuchons method is necessary to avoid this but also requires addition of dairy. Heston blumenthal and Jeffrey steingarten made a similar approach with sous vide potatoes that also require gelatinization of the starches (the 30min heating) and addition of dairy to control texture. While a butter and milk substitute could theoretically be used there is an alternative: diastatic milk powder

With diastatic malt powder you can make extremely smooth potatoes with much less labor and with no dairy at all (so entirely vegan). The diastase enzyme in dmp breaks starches in the potatoes into sugar and allow you to process it much easier:

yukon gold potatoes, peeled, 1in cubes Put in water with salt and sugar (200% water to potatoes, 3% salt, 2% sugar), bring to boil, simmer for 30 minutes Drain Add 1% weight of the potatoes diastatic malt powder (eg if you started with 500g potatoes add 5g powder) to the drained potatoes Blend (it will be very smooth but sticky) Put in a ziplock bag and try to get all the air out Cook in a pot of water at 126F for 30 minutes (if you have sous vide use that, if not it’s not essential, just try to not let it get too hot) Put it in a pan and cook to 167F Season and serve

When you cook to 126F you’re activating the diastase and letting it do its thing for 30 minutes. After the starch conversion you cook to 167F to deactivate the enzyme

This sounds like it’s more work than it is but it’s basically the same amount of work as making regular mash, possibly less since you don’t actually mash them by hand. If you reuse the same pot like i do it doesn’t make that many dishes.

This also has that extremely smooth texture but significantly less labor, it’s vegan, and because you’re not eating 800kcal of butter and milk it’s a more interesting flavor. Especially if you get high quality potatoes it’s a potato purée that allows you to simply taste, well, potato

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