The Double Decker Mushroom & Onion Stack

A colossal hand-held sandwich built in two rich tiers. The top layer features a juicy grilled beef patty smothered in rich white cream mushroom sauce and melted cheese, while the bottom tier is stacked with caramelized onions, crispy bacon, and melted Swiss cheese. All held together in warm, soft-baked buns for a huge savory bite.