Macadamia nuts come from macadamia trees. The nut is encased within a hard green husk and as the nut matures, the husk splits open. Depending on the species of macadamia tree, the nut holds anywhere from 65 to 80 percent oils and 4 to 8 percent sugars.
The macadamia tree is native to Australia. However, South Africa, California and parts of Central America have commercial macadamia nut operations.
Researchers consider macadamia nuts to be a healthy option for people who are watching their diets. Although high in fat, the nut's monounsaturated fatty acids do not raise cholesterol levels.
Recipes that use macadamia nuts include cookies, pesto, salads and trail mixes.