A group of true San Franciscans is easy to spot in the Bay Area wild. Usually, they’re wearing some OG Frisco gear — like an all-gold satin 49ers jacket and Giants fitted brim — and have someone rolling a blunt in the passenger seat of a nearby Buick or Chevy, doors open and music blaring onto the street. That was the vibe at Big Mafi Burger’s recent pop-up at Cookies in Hayward, where San Francisco rapper Cellski came out to supply his culinary goods and put his burger — his grandma’s recipe — to the test. Never one to pass up a Bay Area collaboration, Berner, the S.F. rapper who co-owns Cookies, created his own recipe for the event: The Berner Burger featured jalapeños and barbecue sauce grilled and served on your choice of burger (turkey, beef, vegan) and bun (sesame, brioche, wheat), all “mashed” into a stack of one, two or three flattened patties. Here’s what the 415’s “Mr. Predicter” had to say about his love of music and food in an interview with KQED's Alan Chazaro. Read more through the 🔗 in our bio. ✍️ & 📸: @alan_chazaro/KQED 🍔: @cellski415 @bigmafiburgers