The next time you peel a banana, think twice before throwing away the skin. In Assam, that humble peel has long been transformed into one of the region’s most distinctive culinary ingredients — khar, an alkaline extract that has shaped Assamese cooking for generations.
Unlike many Indian cuisines that rely on layers of spices, Assamese food is known for its simplicity. Fresh seasonal produce, minimal oil and delicate flavours take centre stage. Another defining feature is its focus on balancing the six traditional tastes — sweet, salty, sour, bitter, pungent and astringent. Khar brings that final, distinctive note to the meal.
A recipe born from banana peels
Khar is both an ingredient and the name of a category of dishes made using it. Traditionally, it is prepared from the peels of bhim kol (Musa balbisiana), an indigenous banana variety found across Northeast India.
From sun-dried banana peels to a mineral-rich extract, the making of kolakhar reflects Assam’s deep connection with local ingredients and sustainable food practices. Photograph: (Goya)
The peels are first sun-dried and then burnt into ash. Water is slowly filtered through the ash to produce a dark brown, mineral-rich alkaline liquid known as kolakhar.
The method has been passed down through generations. Many Assamese families prepare large batches that can be stored for months, with each household following its own recipe and preferred strength of the extract. Over time, khar has become as much a family tradition as a pantry staple.
The first course, not the last
In a traditional Assamese meal, khar is served at the beginning rather than the end.
It is commonly cooked with raw papaya, bottle gourd, cabbage, lentils, spinach and even fish. Its earthy, mildly smoky flavour enhances the natural taste of the ingredients instead of overpowering them. Traditionally, it is also believed to help prepare the palate and aid digestion before the rest of the meal.
From a salt alternative to a kitchen essential, khar reflects Assam’s resourceful food heritage. Photograph: (AI-generated using reference)
One of the best-known preparations is papaya khar, in which tender pieces of raw papaya are simmered with the alkaline extract to create a light yet deeply satisfying dish.
More than just an ingredient
Khar’s story is closely linked to Assam’s geography. Historically, the landlocked region had limited access to sea salt, prompting communities to find local alternatives. The alkaline liquid made from banana peels became one such substitute and, over time, evolved into a defining feature of Assamese cuisine.
Its uses extended beyond the kitchen. Older generations valued khar for its high pH and used it as a natural preservative. In some communities, it also served as a cleaning agent for utensils and fabrics. Folk traditions even mention it in home remedies, reflecting how deeply it was woven into everyday life.
A tradition finding new admirers
Today, khar is no longer limited to home kitchens. Restaurants across Assam proudly feature it on their menus, while bottled kolakhar has made it easier for people across India to explore this unique ingredient.
Even so, many families continue to prepare khar the traditional way, ensuring that the knowledge is passed on to future generations.
From traditional kitchens to modern menus, khar continues to carry Assam’s culinary wisdom to new generations. Photograph: (AI-generated using reference)
At its heart, khar reflects the spirit of Assamese cuisine — resourceful, rooted in local ingredients and shaped by generations of lived wisdom. It is a reminder that some of the most remarkable food traditions begin with the simplest of ingredients.
In Assam, one such story starts with a banana peel that has earned a place at the heart of the dining table.
