La Vaca Birria is a Mission District standout, serving up an unapologetically rich and messy Grilled Cheese Birria Burrito. With a stellar 9.2 overall rating, this heavy hitter leans into deep, savory flavors, melted cheese, and creamy guacamole. It’s an indulgent, food-coma-inducing experience that proves why this spot is one of San Francisco’s bes