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In-N-Out Burger
Hamburger (mustard & ketchup) & Diet Coke
Hamburger (mustard & ketchup) & Diet Coke at In-N-Out Burger has 310 calories, 16g protein, 41g carbs and 10g fat — sourced from In-N-Out Burger Nutrition Facts, not AI guesses. Single beef patty, lettuce, tomato, onion, mustard and ketchup - no cheese, no spread - on bun; paired with a Diet Coke (0 cal) for the leanest full burger meal on the menu.
At In-N-Out Burger, the Hamburger (mustard & ketchup) & Diet Coke is low in fat and light on calories. That works out to 5.2g of protein per 100 calories — 9g below the 25g In-N-Out Burger average. Its macros land at roughly 21% of calories from protein, 53% from carbs and 29% from fat. Contains gluten.
Source: In-N-Out Burger Nutrition Facts ↗, last verified Jun 17, 2026. Menus change periodically; values may vary by location. How we verify →
See all 17 In-N-Out Burger meals → · Highest-protein In-N-Out Burger meals → · In-N-Out Burger nutrition calculator →
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