Let’s be honest about something here. Your kitchen wisdom might be more myth than truth. Those time-honored cooking rules passed down from grandmother to grandchild? Well, many of them deserve a one-way ticket to the culinary trash bin. Professional chefs and food scientists have been systematically debunking these kitchen commandments, revealing that what we thought was gospel is often just outdated advice wrapped in tradition. The result is better food, less wasted time, and some serious eye-opening moments for home cooks everywhere.
Searing Meat Seals in the Juices
According to Harold McGee, food scientist extraordinaire and author of On Food and Cooking, searing meat actually forces it to lose moisture, making the meat less juicy. Searing does produce a delicious crust and creates texture, but the best way to seal in the juices is to rest your meat for five minutes before slicing. This myth has survived because it makes intuitive sense. When you see meat shrinking and caramelizing in the pan, it feels natural to assume you’re locking in all those precious juices.
Alton Brown did an experiment testing the myth, and he found that searing meat causes it to lose more moisture than meat that hasn’t been seared. The truth is that searing creates flavor through the Maillard reaction, not moisture preservation. When you sear steak over high heat for instance, the meat is actually undergoing the Maillard reaction – whereby you’re browning the protein. What’s happening here is that the heat causes the surface moisture to evaporate and results in a chemical change which creates intense aromas and flavors.
So why do chefs still sear meat? Because it tastes incredible. The browning creates complex flavors and appealing textures that transform ordinary meat into something spectacular. The key is understanding what searing actually does versus what we’ve been told it does.
Salt Makes Water Boil Faster
Harold McGee notes that it takes one ounce of salt per quart of water “to raise the boiling point a negligible 1°F.” If an ounce of salt only raises the boiling point of water 1°F, you’d need a whole lot of salt to make a noticeable difference cooking-wise. This persistent myth likely exists because salt does technically raise water’s boiling point. But the effect is so minimal it’s practically meaningless in real cooking situations.
While it’s not entirely false, adding salt does not make much of a difference to actually matter. One ounce of salt raises the boiling point of water by only 1 degree Fahrenheit. To raise the boiling point enough to make any significant difference in cooking time, you would have to add so much salt that your pasta, or other food items, would be inedible. The actual boiling time difference amounts to mere seconds, not the minutes many home cooks imagine they’re saving.
The single most important reason to salt your water is to season your food from the inside out. When you cook foods like pasta, potatoes, or beans in water, they absorb that water. If the water is plain, the food will be bland. If the water is seasoned, the food will be seasoned. Professional kitchens salt pasta water because it creates better-tasting pasta, period. The slightly elevated temperature is just a bonus side effect.
Adding Oil to Pasta Water Prevents Sticking
Many believe that adding oil to the pasta water prevents noodles from sticking together during cooking. However, this method is not effective. Oil typically floats on the surface of the boiling water and has minimal contact with the pasta. Therefore, it does little to prevent the pasta from sticking. This myth persists because it feels like common sense. Oil is slippery, pasta sticks, so oil should solve the problem, right?
Wrong. Furthermore, it’s not advisable to drizzle oil over drained pasta either. Doing so can create a slippery coating that actually repels the sauce. The oil creates a barrier that prevents your carefully crafted sauce from properly coating the pasta. When you remove pasta from its cooking water the pasta is still covered in a layer of starch. This is why pasta sticks together. This same starch helps your sauce stick to your pasta. By rinsing, or oiling your pasta, you make it slippery and the sauce has a hard time really holding on to it, leaving much of your sauce to pool on your plate instead of enveloping your pasta.
The solution is simpler than adding oil. Instead of using oil, the best way to keep pasta from sticking is to stir it frequently during cooking. This ensures that the pasta cooks evenly and remains separate. Frequent stirring and using enough water are the real keys to non-sticky pasta. Save your good olive oil for finishing dishes where it can actually be tasted and appreciated.
You Should Never Wash Mushrooms
Contrary to popular belief, washing the grit and dirt off mushrooms using water is harmless. Food scientists suggest that aspiring home chefs can test the theory out for themselves. This myth has convinced countless home cooks to spend precious time delicately brushing dirt off mushrooms with paper towels or special mushroom brushes. The fear is that mushrooms will become waterlogged and turn into soggy disappointments.
Food scientists hypothesize that you could probably weigh a few mushrooms before submerging them in water for various lengths of time, then weigh how much water the fungi retains afterwards. Research indicates that unless you plan to leave mushrooms in water for an extended period of time (they are porous, so they can be subject to liquid absorption), washing them briefly will not cause them to leach out nutrients or be diluted in flavor. The key word here is briefly. A quick rinse under running water removes dirt without turning your mushrooms into sponges.
This experiment demonstrated that mushrooms absorb a small amount of water regardless of length of exposure to water. Since mushrooms tend to have a fair amount of grit and dirt on them, Alton concluded that he will thoroughly wash his mushrooms. Many professional chefs routinely wash their mushrooms, especially when dealing with particularly dirty specimens from farmers markets. The trick is washing them just before cooking and patting them dry immediately afterward.
Marinades Tenderize Meat All the Way Through
It’s true that acidic ingredients denature proteins (change their structure), but most marinades don’t actually penetrate deeper than the meat’s surface. The real reason to use a marinade is to flavor your food and help it retain moisture. This myth has probably led to more disappointingly tough steaks than any other piece of kitchen misinformation. Home cooks marinate tough cuts for hours or even days, expecting miraculous tenderization.
All marinating does is put a tiny bit of flavor on the outside part of whatever it is you’re marinating. If you use acid – or the other thing people often use is papaya juice – theoretically, it will tenderize the meat, but only to the same depth as those marinades penetrated. All it does is make the outside mushy. The harsh truth is that marinades work primarily on the surface of the meat, creating a thin layer of altered texture rather than deep tenderization.
Very simply, because marinades do not penetrate very far into the meat. Not enough to tenderize anything but the most paper thin of cuts. It is true that dairy- based marinades (like yogurt or buttermilk) will penetrate further into meat but even then they don’t penetrate very far. For truly tough cuts, mechanical tenderization through pounding, scoring, or long, slow cooking methods work far better than soaking in acidic liquids. Marinades excel at adding flavor, not transforming texture.
All the Alcohol Cooks Out During Cooking
Heat does reduce alcohol’s potency (so you’re not getting anyone drunk with Grandma’s famous rum cake recipe), but the alcohol doesn’t completely cook away. It will if you heat it long enough, but that would take up to three hours in most dishes. This myth creates problems for people who need to avoid alcohol completely due to medication, recovery, or religious reasons. Many assume that adding wine to a pan sauce or bourbon to a marinade eliminates all traces of alcohol.
The small amount of alcohol that remains won’t bother most folks, but some people – whether because of medication, addiction recovery, religious reasons, or allergies – need to avoid alcohol, even in the tiniest amounts. The amount of alcohol retention depends on cooking method, temperature, and time. A quick flambé leaves more alcohol than a long braise, but neither eliminates it completely.
While it’s true that some of the alcohol content evaporates, it doesn’t all disappear. Understanding this helps cooks make informed decisions about when and how to use alcoholic ingredients. The flavors from wine, beer, and spirits absolutely enhance many dishes, but they come with trace amounts of alcohol that persist through most normal cooking methods.
The bottom line? Question everything you think you know about cooking. These myths persist because they sound logical and get passed down through generations of well-meaning home cooks. Professional chefs and food scientists have spent decades testing these assumptions, and their findings consistently challenge conventional wisdom. Your grandmother might have been an amazing cook, but she wasn’t a food scientist. Trust the research, experiment fearlessly, and prepare to be surprised by how much better your food becomes when you stop following rules that were never true in the first place.
What cooking myth had you fooled the longest? The evidence is clear on these six, but there are probably dozens more waiting to be debunked in kitchens everywhere.
