Why are some hardboiled eggs a breeze to peel? And others are downright infuriating? So infuriating so, that I often end up just tossing the partially-peeled, totally pock-marked orb into the trash. Well, there IS a way to cook hardboiled eggs such that the shells almost slip off effortlessly. It's science!
The key to the easy-to-peel egg is getting the membrane to pull away from the whites effortlessly. The membrane separates the whites from the shell & is a critical line of defense against bacteria entering the egg. In the infuriating, impossible to peel egg, that membrane is sticking to the whites, pulling off little chunks of whites all over the place. We want that stubborn membrane to just let go into a thin, translucent wisp of papery skin. How do we do that? Chef Hoffner says we need to "shock" the egg with HEAT and then again with COLD.
First, don't use super fresh eggs. The fresher the egg, the more acidic the albumen, or "the whites". And more acidic whites bond more strongly with the membrane. As eggs age, the whites get less acidic (ie, more basic) & thus, less sticky. (Note for those chemists in the group: Yes, eggs are pretty neutral, pH-wise, with fresh eggs having a pH of ~7.7. As they age, they can reach a pH of 9.7. The "relative" acidity of fresh whites is just in relation to the acidity (or lack, thereof) of older eggs.)
Once you have your not-super-fresh eggs, keep them COLD. You do not want room temperature eggs. Remember, you need to SHOCK the egg, so that the membrane retracts & recoils away from the whites. You will not get optimal shock value if the eggs have already been given the chance to warm up a bit, sitting on your kitchen counter. Similarly, you want to put those cold eggs into BOILING water. Again, it's all about maximum shock value. Don't put the eggs in and THEN bring the water to a boil. You want the HOTTEST water & the COLDEST eggs. Bam! Plenty of shock & that membrane isn't going to know what to do!
As if one shock isn't enough, after boiling for about 10 minutes, bring in the "awe" -- shocking the eggs a second time by immersing them in an ice bath to halt the boiling process. The ice bath should last about 10 - 15 minutes, and you will likely need to periodically add more ice to keep the water cold. Hardboiled eggs retain a ton of heat! Scroll down to follow Chef Hoffner's Steps for Easy Peel Eggs.
Chef Hoffner's Easy Steps to Easy Peel Eggs for Gorgeous, Pearly Hardboiled Eggs
Bring a pot of water to a steady, hearty boil. Then turn it down to a gentle boil so the eggs will not be jostled around too much & crack.
Carefully add COLD eggs (right from the fridge) to the boiling water. It is best if the eggs are not super fresh.
Continue to boil for ~ 10 minutes. While the eggs are boiling, prepare an ice bath (1/3 ice, 2/3 water in a large bowl or pot. Try to use a put that is large enough to leave room for adding more ice later and/or that has a lid, so you can periodically tip over (using the lid as a strainer) to pour out the tepid water & add more ice.
Transfer eggs to ice bath for about 10 to 15 minutes, insuring that the ice bath stays cold & icy.
What about soft or medium boiled eggs?
When are they cooked properly? A general rule of thumb is 6 minutes for soft-set and 8 minutes for medium-set. And don't skip the ice bath -- it's critical to stop the boiling process, or you will end up with hard-boiled.
But to take the guess work out, I love this simple, low-tech gadget (available in the 70N Market). Drop it into the pot of boiling water along with your eggs. It'll change color throughout the process to indicate when the eggs are soft, medium, or hard set, letting you know when to get the eggs into their icy bath. It's called an "egg timer" which is very much a misnomer -- it doesn't keep track of time at all. It really keeps track of temperature. And this "timer" can be very important when you are cooking 2 eggs in one batch and 6 eggs in another batch. Each cold egg lowers the temperature of the boiling water, & therefore, increases boiling time. This egg timer detects the subtle temperature changes, regardless of how many cold eggs get dropped into the pot. When the egg "timer" gets to the optimal temp, it's color will let you know if your eggs are perfect.
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