Most macadamia nuts sold without shells because the shell is too hard for your regular tools to crack open at home. Macadamia shell hardness exceeds all other tree nuts by a wide margin. Stores sell them shelled because most buyers lack the right equipment to crack them.
When I first harvested nuts from my own trees, I tried cracking macadamia nuts with a regular nutcracker. The tool broke before the shell did and I ended up with sore hands from the effort. In my experience, you need special tools to get at the kernel inside.
The macadamia shell requires about 300 pounds per square inch of pressure to crack open for you. That's far more force than you can apply with normal tools at home by hand. Standard nutcrackers max out around 50 PSI which won't even dent these tough shells.
Big factories handle macadamia nut processing with large cracking machines that run all day long. These tools apply just the right pressure to each shell as it passes through the line. They cost thousands of dollars and crack huge volumes of nuts each hour so you can buy them shelled at stores.
If you want to crack your own harvest at home, you need to buy a purpose built macadamia nutcracker. These tools use leverage to multiply your hand strength enough to crack the shell. They cost between $50 and $150 depending on the model and quality you pick.
Position the shell with its seam facing up when you crack it for the cleanest kernel extraction each time. The seam is the weakest point on the shell where it will split with less force from you. This technique gives you whole kernels instead of crushed pieces more often than not.
The investment in a proper cracker pays off if you grow your own trees or buy nuts in shell at lower prices from farms. I crack my harvest in batches while watching TV and store the kernels in my freezer for later use. The fresh taste beats store bought nuts that sat on shelves for months before you bought them.
You now know why stores sell these nuts without their shells already removed for you to eat right away. The extreme shell hardness makes macadamias unique among all tree nuts for home processing. Get the right tools if you want to crack your own nuts and enjoy that fresh roasted flavor at home.
Read the full article: Growing Macadamia Trees: A Complete Care Plan
