Chipotle Mexican Grill Inc. is testing six new menu items at its New York City test kitchen including quesadillas, nachos and a Mexican chocolate milkshake made with cinnamon and spice. Chipotle, which does not often change its menu, added queso last year, which was not well-received on social media. Chipotle says that quesadillas and nachos are items that many customers have requested. The other items are avocado tostada, Chipotle's version of avocado toast made with a crispy corn tortilla that been fried and topped with guacamole and a choice of salsas, lettuce and cheese; a spring mix salad with avocado citrus dressing; and a frozen Paloma. A Paloma is traditionally made with tequila and grapefruit juice. Chipotle shares have rallied 63.1% for the year so far, far outpacing the S&P 500 index which is up 3.3% for the period.