paulraphael

Has anyone heard about this high-frequency induction technology? It allows induction to be used with non-ferrous metals, including copper. Aparently it's been around since 2009, but I can't tell if it exists in any products. The wikipedia article on induction mentions it, but says little except that the components are "relatively bulky." Edited to add: this chowhound thread suggest a product exists in Japan. There's some info on it.

Also keep in mind that those ideal temperature for the maillard reactions are the temperatures of the food surface, not the pan surface. The food is going to be rapidly cooling itself while searing even if the pan temperature itself doesn't drop. All that sizzling you hear is water rapidly evaporating from the surface and bubbling through the fat. And there's the conductivity of the pan surface, the conductivity/convection of the cooking medium (oil) and the conductivity of the food itself, each of which is less than 100% efficient.

What are your experiences with SV Dash? I just downloaded it. The concept is great, but I can't explain the gigantic discrepancies between its recommended times and the tables in Modernist Cuisine. For example, for a 1" thick steak brought to 54C in a 55C bath, starting at 5C, the MC table predicts 34 minutes and SV Dash predicts 55 minutes. Over 60% off.

The ideal temperature is probably around 450°F. But! Unless you have 10s of thousands of BTU/hr pouring into your pan from a commercial range, or a fantastically heavy and conductive can (like maybe a griddle you need help picking up) your pan is going to cool significantly when you drop a piece of food on it. In order to keep the pan up into the ideal range for searing, in most circustances you have to start higher. Chris's rule for using the smoke point of the oil might work for you. If you have a weaker range and a big slab of meat, you may have to go higher, which means pouring the oil in the pan and then dropping the food in before the oil gets too hot.

I don't know about shielding, but they could probably design something like the balanced connectors used in audio. The design cancels out any electromagnetic interference.

What are people's favorite temperatures for wild salmon? And has anyone found a good way to cook SV with the skin on, for crisping up afterwards? I notice the approaches in MC all advocate removing the skin and cooking separately.

Interesting. I use the ziplock freezer bags regularly at 85C, and once at 90. Never had a leak. Maybe there are conisistency issues from one batch to the next? One possibility is to to use the open bag method. Let the water seal the bag, and secure the tops of the bags to the edge of the container or to some kind of rack with a bulldog clip.

I'm looking at a picture on their website. The dasher and the bowl come off, yes? I don't know if this is different (or better in any way) that what you do now, but I grab a couple 1qt takeout containers and a couple of silicone spatulas and keep them handy. I pull the dasher out and with a spatula scrape all the ice cream off and into the bowl. Gravity helps. The bowl is cold, so there's no worry of anything melting in there. Then I pull the bowl over to the takeout containers and use the spatulas to scoop the ice cream into them. One of the spatulas is concave, so it holds a lot. The other one is flat and is better for scraping the last of the stuff off the bowl. I guess this still amounts to scooping stuff out, so maybe it doesn't help. Unfortunately I don't know of an easier or more automated way. Except ... who's eating all this ice cream? Maybe someone can be conscripted into duty?

Is it difficult to get out because the ice cream is hard? Do you know your drawing temperature (the ice cream temperature when it's done freezing?) Generally the ideal drawing temperature is -5°C / 23°F. A mix designed to have good texture at serving temperature (about 5C lower than this) should be pretty soft at this temp ... not much harder than soft serve. The solution might be to spin for a shorter time, or to increase the freezing point suppression of your mix. Getting it out of the machine should be easy!

That was my point. I know there are a million counter-examples. I still think that polish sends a different message than tarnish ... based on what I see most often. And I personally prefer the tarnish. It's all just esthetics.

http://www.oldwillknottscales.com has a great selection and prices and service. You can easily narrow down your choices with the tools on the site.

The bottom of the wok and the oil in it get hot, but they don't have the heat capacity to store very much energy. And a home stove can't replenish the energy very quickly. So when you dump a bunch of meat into the bottom of the wok, it sucks most of the stored energy right out of it. The meat gets hot, but not hot enough, and your left with steaming meat on a warm wok. It's not for nuthin that chinese restaurants have 100,000+ but/hr burners.

I bet it would be an improvement over my unmodified burner. But not such an improvement that my pseudo stir-frying would be considered the real thing.

Kenji at Seious eats posted a review. It looks like a heat focuser. The bottom of the wok will get blazing hot for a good sear, but there won't be enough energy to maintain that heat, except with very small batches, as everyone's saying.

Sure, impressions can be wrong. I've seen restaurant kitchens in Paris and NYC where some poor worker had to polish all the pans every night. And I have a close friend who was both a serious cook and a compulsive polisher. I laughed at him, but he ignored me (he finally stopped when mom heard him polishing over the phone. "David," she said, "stop polishing your pans and go out and make some friends.")

That's exactly right, and is one of the points made in that study I cited earlier. They basically said, "here's what little we know about some of this stuff." It's surprising we don't hear more random spoilage stories from long, low-temperature cooks. I may add a blanching step just as a matter of routine insurance.

To my eyes, tarnish patina says "these are pans. They get used." Polished copper says "these are trophies."

I can see how the SVS would be convenient for someone willing to dedicate counter space to another appliance. At least as far as storage goes. It's going to be a lot harder than a cambro to fill and clean. I'm using the v1 Anova, which is very small. It fits on a low shelf right next to my 11x11 polycarbonate container. I use that container of the time. It stows with its lid, a piece of reflectix cut to fit, and an SVS rack (which fits perfectly with the anova). I've also got a 30qt cooler cut to fit the circulator. That gets used less often, so I store it away from the kitchen. One thing I like about this setup is that it would be trivially easy to pack it all and bring to someone else's house, or to an event space. It's a great portable solution.

Interesting: Microbial deterioration of vacuum-packaged chilled beef cuts and techniques for microbiota detection and characterization: a review "Clostridium and Enterobacteriaceae (5), can multiply in vacuum-packaged meat causing deterioration and pack distension at refrigeration temperatures. These microorganisms have been the subject of many studies. Species of Clostridium that are able to grow at refrigeration temperatures have been identified as causative agents of blowing vacuum packages. Recently, new genera, such as Enterobacteriaceae, have also been shown to cause the same problem" "The deterioration caused by psychrotrophic and psychrophilic Clostridium is associated with proteolysis, loss of texture, accumulation of liquid in packages and an unpleasant smell, mainly hydrogen sulfide gas (55). In anaerobic conditions, proteins are degraded into sulfur compounds, which have strong and disgusting odor. End products of non-protein nitrogen compounds generally include ammonia (34)." "The deterioration of vacuum-packaged meat caused by Enterobacteriaceae bacteria is often characterized by unpleasant odors and / or greening of the meat, instead of gas production (5). The proliferation of this bacterium in vacuumpacked meat is generally limited to products with a pH greater than 5.8 (28) and is more likely to occur with temperature abuses (5) above 6ºC (36). Enterobacteriaceae species that grow in vacuum-packed meat (Serratia liquefaciens, Hafnia spp) are able to grow at temperatures between 0 and 10ºC (43). At temperatures above 6ºC, Enterobacteriaceae decarboxylate amino acids, producing organic amines, which have putrid odors and tastes." "Vacuum packages for fresh meat increase the shelf life and thus improve the distribution efficiency and marketing of the product. Deterioration problems are minimized when the pH of the meat to be packaged is controlled and ideal storage temperatures are accurately maintained. Even at suitable refrigeration temperatures, however, meat may be subject to deterioration by microorganisms that are able to grow under these conditions in the absence of oxygen. Psychrotrophic and psychrophilic Clostridium species have been shown to cause blown pack type of deterioration; however, other species that produce CO2 such as Enterobacter, Serratia, Hafnia and Rahnella may also contribute. There has been little research on these organisms, especially those that cause the blown pack problem."

Edward, I was trying to say that the 7qt is close to the hobarts except that it has electronic speed control (rather than a multispeed gear box). And by close, I just mean that it has a big motor, good quality gears, and real bearings.

The issue is that the brisket was rolled before vacuum packing. If you want to do it this way, then dipping the bagged brisket in boiling water will still only heat the portions that are currently on the outside. I would just dispense with the vacuum packing. It's not necessary. Use a big ziplock or an oven bag, with a little liquid added (stock, etc.). Evacuate the air by immersing it. There's really no downside.

The 18-10 stainless used in laminated copper pans is not magnetic. I'd assume those pans are lined with tin. The only caveat is that I once saw an ad for copper pans lined with nickel.

How was the lilac ice cream? We're growing some lavender ... I may try something with it when it's ready.

Shalmanes's explanation makes more sense than the mold idea. It's an interesting point ... should be obvious, but I've never seen rolling meat mentioned specifically as something to avoid.

Since you said green-brown slime and dry aging, I'm wondering if it was actually some form of mold. There aren't any bacterial pathogens that reproduce at 56C, so I don't believe that bacteria would be the issue. Technically your meat should have been pasteurized within 6 hours of reaching 55C. But I never hear anyone talk about mold (or algae) when coming up with food pasteurization tables. Dry aging often encourages mold growth on the outside of the meat. It's cut away with the dessicated outer portions, but this isn't done under sterile conditions. The question is if there's any mold that grows in both the medium humidity and sub-4°C environment of dry aging, and the 100% humidity and 56C environment of your sous-vide bag. It's a new one to me. I don't believe you did anything that would raise a red flag, but many people choose to sear or blanch meat before any long, low-temp cook. I'd suggest doing this in the future. But it doesn't answer your question directly. I can just offer another guess as to what happened.