These ancient cooking sites, found in their thousands across Ireland, are among the most numerous and least celebrated of all prehistoric monuments. A fulacht fia typically takes the form of a low, horseshoe-shaped mound of fire-cracked stone and dark, charred earth, the accumulated debris of repeated use over many generations. The standard interpretation is that water was boiled in a nearby trough by dropping stones heated in a fire directly into the liquid, though the sites have also been associated with textile processing, bathing, and brewing.

The Brownstown example came to light through local knowledge rather than formal excavation, which is not unusual for this type of site. Many fulachtaí fia have been identified in exactly this way, noticed by farmers or landowners who recognised the characteristic scorched mound during fieldwork or ground disturbance. The site was recorded in the Archaeological Inventory of County Cork, a systematic county-wide survey published in 1994, where it appears among the considerable concentration of prehistoric remains across east and south Cork. The date of discovery, circa 1973, is the only specific detail available, and beyond that the record is sparse, which itself says something about how quietly these sites have tended to enter the archaeological register.