Which margarita can be served frozen during Happy Hour?

The Sauza Gold Coast Rita is the correct margarita that can be served frozen during Happy Hour. This drink is part of the core menu offerings at Outback Steakhouse and is specifically noted for its availability in a frozen version. This margarita typically features a blend of Sauza Gold tequila, triple sec, and house-made sour mix, which lends itself well to being served in a frosty, slush-like form, enhancing its appeal during Happy Hour.

The other margaritas mentioned may not be available in a frozen version during Happy Hour. For example, the Top Shelf Rita, while often served on the rocks, might not be specified for the frozen option. The Blood Orange Rita and the Naturally Skinny 'Rita, with their unique ingredients and focus on a fresh, lighter taste, are also usually offered as on-the-rocks drinks rather than frozen. Therefore, the Sauza Gold Coast Rita stands out as the designated frozen option during that special time.