Every Jack in the Box Burger Ranked: Where Does the Sourdough Jack Stand?

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Fast food burger reviews cannot ignore the nutritional reality. The Sourdough Jack registers at 660 calories, with 41 grams of total fat (including 15 grams of saturated fat) and 1,180 milligrams of sodium. Those figures put it roughly mid-tier for a premium sandwich, far below the heavyweight Bacon Ultimate Cheeseburger's 930 calories and 1,960 milligrams of sodium.

The sourdough bread introduces a specific trade-off. While it creates far superior chew and crust compared to standard buns, the oil application required for flat-top toasting increases the sandwich's fat content noticeably. You pick up the sandwich and your fingertips reflect the sheen instantly. If you order it via third-party delivery services where it steams in an insulated bag for 25 minutes, that toasted crust softens into an oily sponge. Consuming it fresh at the drive-thru window remains essential for peak texture.