Burger & Mayo Lab

Smash Burgers & House Mayo Lab on Calle Loíza

Address: 2016 Calle Loíza Local A, San Juan, PR 00912
Phone: +1 787-946-0115
Hours: Mon 14:00–21:00, Wed–Sun 12:00–22:00 (closed Tue)

Menu prices: $1.50–$18.95 · $ · Median main: $13.95 · 37/37 with a published price

Burger lab on Calle Loíza serving smash burgers, cod-battered onion rings, truffle mac & cheese, and house mayo sauces — plus La Fórmula house cocktails, milkshakes, and a doggy menu.

Aperitivos

• Onion Rings — $11.95

  From Aperitivos. Famous onion rings breaded in a cod-fish fritter batter, served with Mayo Aioli.
• Sliders — $10.95
• Tacos de Pescado / Fish — $11.95
• Tacos de Pollo / Chicken — $10.95
• Chicken Fingers — $9.95
• Mayo Juicy Fries — $10.95
• Juicy Nachos — $10.95
• Mac & Cheese — $11.95
• Mac & Cheese Fries — $15.95
• Mac & Cheese Batatas — $16.95
• Alitas — $13.00
• Más Alitas — $15.00
• Quesadillas de Costilla — $14.95

BM Lab Combos

• Mayo Lab Sauces — $1.50

  From BM Lab Combos. House mayo sauces served individually: Mayo Lab, Mayo Ketchup, Mayo Aioli, Mayo Tártara.
• El Mezclaito Smash — $15.95

  From BM Lab Combos. Mezcla sandwich with provolone, Spam jam, crispy fried onions and fresh potato wedges.
• Cabrita Smash — $18.95

  From BM Lab Combos. Wagyu smash burger with local goat cheese, bacon jam, crispy onions and spicy honey, with truffled fries.
• Smash Bacon Jam — $15.95

  From BM Lab Combos. Smash burger with American cheese, crunchy onions and house bacon jam, served with fries.
• Pepperoni Melao' — $15.95

  From BM Lab Combos. Burger in pomodoro sauce with pepperoni honey, mozzarella and muenster on brioche.
• Bacon Dip Burger — $16.95

  From BM Lab Combos. Burger with American and Swiss cheese, bacon and five-cheese sauce on the side. Includes fries.
• Smash Burger — $15.95

  From BM Lab Combos. Burger on croissant bread with American cheese, grilled onion and special sauce with pickles.
• Dulce y Salao' — $14.95
• Olé Burger — $16.95

  From BM Lab Combos. Burger with manchego cheese, chorizo and mushrooms, served with truffle parmesan fries.
• Chicken Lab — $16.95

  From BM Lab Combos. Breaded or grilled chicken breast burger with coleslaw, honey, pickles and fried onions. Includes fries.

Create Your Own Burger

• Meat Burger 8oz — $15.00

  From Create Your Own Burger. 8oz meat burger with lettuce, tomato and pickle. Toppings included.
• Vegetariano — $13.95

  From Create Your Own Burger. House-made grain-based vegetarian burger with lettuce, tomato and pickle.

Acompañantes

• Papas Fritas — $3.75
• Papas Aioli — $4.75
• Papas con Queso — $5.50
• Papas trufadas con parmesano — $5.50

Bebidas

• La Fórmula — $15.95
• La Solución — $15.00
• Espresso Martini — $13.95
• El Problema — $12.95
• Heisenberg — $14.95

Postres y Batidas

• Tarta Vasca de Manchego — $9.00
• Batida de Oreo — $10.95
• Batida de Nutella — $10.95