To celebrate one year in Round Rock, the 2600 Hoppe Trail location of Hopdoddy is reintroducing the Code 7 burger — crafted with angus beef, Tillamook cheddar, applewood smoked bacon and fried egg between two Round Rock Donuts glazed doughnuts. The burger has only been available one time before, for the restaurant's opening, and will only be on the menu for a limited time, between January 20 and 22.  The Code 7 Burger costs $11. Only 72 of these burgers will be available for order each day. When the restaurant runs out, no more will be made. The Code 7 burger is named after the code cops use for a coffee and doughnut run. The Round Rock Hopdoddy opened Jan. 18, 2016, the third location of the burger chain.