CHATTANOOGA Tenn. Krystal, the regional burger chain, is upgrading its milkshakes with the rollout of MilkQuakes, a line of the frozen drinks custom-made with real ice cream and milk. Each sells for $2.79.
The new treats will be offered in vanilla, strawberry and chocolate versions. Each is topped with a optional dollop of whipped cream and served in a 20 oz. cup.
Krystal isn't the only chain hoping t