Mercado de Pinheiros is where São Paulo's spice tolerance gets real. Forget the tourist-friendly versions in Vila Madalena — This covered market near Fradique Coutinho metro station serves Brazilian food hot enough to hospitalize unprepared visitors. I'm talking about vendors who literally keep medical-grade milk on standby.

Box 23, operated by the legendary Dona Maria, serves xinxim de galinha that requires signing an actual liability waiver. She uses fresh malagueta and scotch bonnet peppers imported from Bahia, building heat in layers that'll have you sweating from places you didn't know had pores. R$18 gets you a portion designed to destroy most humans. She refuses to modify spice levels and keeps whole milk behind the counter "for emergencies" — I've seen grown line cooks weep openly.

Her weekend feijoada (Saturdays only) includes dendê oil infused with ghost pepper extract. Seriously. The regulars call it "feijoada do inferno" and treat it like a rite of passage. The heat builds slowly then hits like a freight train around the third spoonful.

Hit the market weekday lunch hours (11:30am-2pm) when it's mostly construction workers and office staff from nearby buildings. Weekend crowds water down the spice levels because too many tourists tap out mid-meal. Located at Rua Pedro Cristi, 89 — Take the Fradique Coutinho exit from Line 2 (Green) and walk 3 minutes. Bring tissues, have your phone ready to call for backup, and respect the capsaicin.