Tabon-tabon is a wild tropical fruit known for being an ingredient in kilawin.
Many households in the Visayas and Northern Mindanao areas of the Philippines have tabon-tabon trees in their backyards.
Filipinos in other parts of the country who did not grow up where the trees are native have described the outer appearance of the tabon-tabon as being similar to a chico fruit, which has the same brown color.
Closer inspection reveals that its outer covering is not soft like that of a chico fruit, but is a very hard shell.
Each tabon-tabon fruit has only one seed — a very large seed whose brain-like pulp can be seen when it is cut in half. Because the soft pulp hardens very fast when exposed to air, you must scrape it off the skin as soon as possible.