Uses
The nuts are usually used in baking and making candies, having an oily texture and pleasant flavor.
Butternut wood is light in weight and takes polish well, is highly rot resistant, but is much softer than Black Walnut wood. Oiled, the grain of the wood usually shows much light. It is often used to make furniture, and is a favorite of woodcarvers.
Butternut bark and nut rinds were once often used to dye cloth to colors between light yellow and dark brown. To produce the darker colors, the bark is boiled to concentrate the color. This appears to never have been used as a commercial dye, but rather was used to color homespun cloth.
During the American Civil War, the term "butternut" was sometimes applied to Confederate soldiers. Some Confederate uniforms faded from gray to a tan or light brown color. It is also possible that butternut was used to color the cloth worn by a very small number of Confederate Soldiers. The resemblance of the tan colored uniforms to butternut-dyed clothing, and the association of butternut dye with home-made clothing, resulted in this derisive nickname.
Butternut bark has mild cathartic properties and was once used medicinally in place of jalap, a more expensive cathartic which was imported from Mexico. During the American Revolution, a butternut extract made from the inner bark of the tree was used to prevent smallpox, and to treat dysentery and other stomach and intestinal discomfort.