Olive Garden fans and the curious line up at the Olive Garden truck in the Flatiron District in New York.

Shares of Darden Restaurants jumped more than 6 percent Tuesday, a day after the company posted better-than-expected fiscal third-quarter earnings and said it would buy Cheddar's Scratch Kitchen.

Cheddar's is a casual dining chain with a focus on value, and it will join Darden's portfolio, which includes Olive Garden, LongHorn Steakhouse and other brands.