How to Crack and Shell Walnuts (7 Ways to Open Raw Nuts)
Shelling and Cracking Walnuts
Most edible nuts are pretty easy to separate from their shells. However a walnut kernel and its crinkly outer shell often seem impossible to prise apart. My success rate in getting the kernel out in one piece is only around 50%.
In order to help others who may have a similar problem, here are a few good (and not so good) ways to crack open and shell walnuts. Some of them are serious and some are (just a little) tongue in cheek. You can make up your own mind which is the most effective.
7 Ways to Crack Open Raw Walnuts
- The hammer blow.
- Crushing machine.
- Hinged nutcracker.
- Screw press nutcracker.
- Sharp knife blade.
- Freezing (ice crystals expand).
- Door hinge desperado.
1. Cracking Walnuts With a Hammer Blow
Have you ever heard the expression "taking a sledge-hammer to crack a nut"? It literally means using disproportionate force to achieve a simple aim.
- Take a hammer.
- Strike the walnut.
Unfortunately, the result is that the nut is smashed along with the shell. Unless you have the patience of Job and pick out the fragments of edible kernel from amongst the broken shell pieces, this is not a good method.
However, if you are of a gentle and patient disposition, it is possible to gently tap the walnut with a small hammer and by tapping (not hitting) the shell, can achieve good results as shown in the video below.
How to Crack a Walnut Gently
2. Separating Walnuts from their Shells in Quantity
The farmer in the video below smashes his walnuts in quantity. He has devised his own walnut crushing machine by using an old out of date hay crimping machine. Having reduced the nuts to a complex mess of shell and kernel, he then proceeds to sieve the two components apart again. His sells the walnut kernels and uses the broken shells as fuel in his wood burning stove to provide winter heat. This method of shelling walnuts is unusual and not for everyone!
3. Use a Hinged Nutcracker
A nutcracker is an implement that in its simplest form is just two pieces of metal or wood joined by a hinge. You put the nut near the hinge and grip hard. Your success at cracking a nut depends upon your personal grip strength. So for some people a simple nutcracker is enough. The classic design of nutcracker is often sold with picks to help you prise every last piece of the kernel away from the shell.
4. Screw Motion or Screw Press Nutcracker
Many people need a little help with applying the pressure needed to crack walnut shells easily. This is where the screw motion or screw press nutcracker comes to the rescue. This ingenious device dates back hundreds if not thousands of years. By using a screw motion, pressure is applied onto the shell of the nut without the user having a strong hand grip themselves. The amount of pressure used can be carefully regulated. This means that as soon as the walnut’s shell cracks, pressure can be stopped. The walnut kernel can then be removed in one piece rather than in fragments.
Screw type nutcrackers are usually made of either wood (known as treen), or of metal (often stainless steel). There are also many examples of these type of nutcrackers made in the shape of a person as tourist souvenirs.
5. Use a Sharp Knife to Open Walnuts
If you have a steady hand (and there are no small children nearby) you could use a sharp knife to open the walnut and get the kernel out in one piece. The video below demonstrates this method.
The tip of the knife is placed into the seam or hinge of the walnut. Once inserted, the knife is twisted to force open the seam. If done correctly, the shell of the walnut will split open. Please take care if you use this method, as it'is easy for a knife to slip and cause injury.
How to Shell a Walnut
6. Freezing Method Works for Quantity
Using a freezer to crack open walnuts relies on the chemistry of water changing from a liquid into a solid. Put the walnuts into a freezer bag and seal. Place the sealed bag into the freezer for several hours. The water present in the nuts and their shells freezes. Water expands as it freezes and so the shells will split open.
This method works well for walnuts intend using for baking or cooking. This is because the expansion and contraction of the water within the nuts causes the kernels to become slightly soft and flabby tasting. If you use this method and intend eating the walnuts as a snack, you will need to roast or cook them before eating.
7. Rough and Ready Method Using a Door Hinge
If all else fails you can use a door hinge. With this rough and ready method the walnut kernel is undamaged (although I cannot guarantee that the doorjamb will remain unmarked!)
- Find a suitable door with a hinge in good condition.
- With the door open, place the walnut in the hinge between the door jamb and the door.
- Close the door so that the hinge presses tight onto the nut. You will hear a cracking sound as the shell splinters.
- Carefully pick out the kernel from among the debris (and eat).
What's the best trick to break open walnuts?
Best Way to Separate Hull From Walnut
If you grow and pick your own walnuts, you may need a quick and easy way to de-hull a lot of nuts. The video below shows how this can be done using water and a pressure hose. When the weather is hot, this is a fun way to complete your harvest.
Dean's Easy Way to Husk Walnuts
Is it OK to Roast Walnuts in Their Shell?
I like to eat walnuts raw even though their shells are awkward to remove. Some people prefer to eat them roasted as this makes de-husking less of an issue.
You can roast walnuts in the oven at 1700 Fahrenheit for 15 to 20 minutes. Spread them out on baking sheets. If they are too close together they will take longer to cook. Allow the nuts to cool before attempting to remove the shells. The roasted husk is brittle and should be easier to crack than that of an unroasted nut.