Kausani is often equated with Darjeeling because of the high quality tea produced here. Buying some packets of tea produced here is a must for every tourist. The tea gardens here are mostly those of Girias Uttaranchal Tea.
Also, you can buy some 'Himalayan Fresh' organic products such as pickles, herbs, jams and honey, local grains like cholai and red rice, rhododendron and other squashes. Kausani grocers also keep local kumaoni products like nutritious madua flour and the gehat and dals that you can buy for a Kumaoni favour back home.