These Hamburgers Could Frikkin’ Kill You, Man.
Fast-food giants like Burger King, Wendy’s, and Heart Attack Grill are dishing out burgers so packed with calories and fat they might just make your heart beg for mercy before you finish the last bite.
Here’s the TL;DR...
Some burgers top 1,500 calories, with fat grams in the triple digits.
Chains like Fatburger and Heart Attack Grill push extremes, but major players aren’t far behind.
Regular indulgence raises risks for heart issues and weight gain.
Moderation is key—treat these as occasional splurges.
What Are the Fattest Burgers You Can Order?
Here’s a rundown of some of the most calorie- and fat-heavy burgers from major chains and outliers, based on verified nutritional data:
Heart Attack Grill Quadruple Bypass Burger: 9,982 calories, 299 grams of fat. Four half-pound patties slathered in lard with bacon and cheese.
Fatburger XXXL Triple Kingburger: 1,868 calories, 126 grams of fat. A beast with three massive patties and all the fixings.
Wendy’s Pretzel Bacon Pub Triple: 1,520 calories, 106 grams of fat. Pretzel bun and beer cheese sauce pile on the richness.
Burger King Triple Whopper with Cheese: 1,350 calories, 90 grams of fat. Three quarter-pound patties make this a heavyweight.
Carl’s Jr. Double El Diablo: 1,290 calories, 76 grams of fat. Spicy toppings and bacon push it over the edge.
Whataburger Triple Meat Whataburger: 1,070 calories, 65 grams of fat. A Texas favorite that’s sneakily heavy.
Sonic SuperSONIC Double Cheeseburger: 1,070 calories, 71 grams of fat. Double patties and cheese keep it in the danger zone.
Five Guys Bacon Cheeseburger (with extras): ~1,000+ calories, ~62+ grams of fat. Custom add-ons can easily tip it higher.
Shake Shack Double ShackBurger: 760 calories, 48 grams of fat. Smaller but dense, especially with bacon.
Why Do These Burgers Pile on So Much Fat?
Multiple beef patties, often quarter-pounders or bigger, plus cheese and bacon, are the main culprits. Sauces like mayo and specialty toppings like fried onions add hundreds of calories without much nutrition. Fatburger and Heart Attack Grill lean into this with oversized portions.
How Does High Fat in Burgers Affect Your Heart?
Saturated fats raise LDL cholesterol, which can clog arteries over time. High-fat meals may cause immediate blood vessel stiffness, per one study. Trans fats in some processed ingredients lower good HDL cholesterol, doubling the trouble.
Can Custom Burgers Get Even Worse?
At Five Guys, piling on extra patties and toppings can turn a bacon cheeseburger into a 1,000-calorie-plus monster. Their peanut oil fries push combos even higher.
Shake Shack’s Double ShackBurger starts at 760 calories, but bacon and extra sauce can nudge it toward 1,000. Customization is a trap for the unwary.
What About Extreme Outliers Like Heart Attack Grill?
Heart Attack Grill’s Quadruple Bypass Burger is a 9,982-calorie stunt with 299 grams of fat. Their Octuple Bypass hits nearly 20,000 calories—pure excess for shock value.
It’s a gimmick, but the health risks are no joke.
How Do Extra Calories Lead to Long-Term Weight Issues?
These burgers often exceed 1,000 calories, making it easy to overshoot daily needs and store fat. Obesity and diabetes risks climb with regular indulgence. Refined carbs in buns spike blood sugar, driving cravings.
Are There Any Upsides to These Indulgent Burgers?
Beef’s protein keeps you full longer than lighter options. Chains like Shake Shack use hormone-free beef, a small win.
The real draw? That unbeatable, greasy satisfaction.
What Healthier Swaps Can You Make at These Chains?
Choose single-patty burgers or grilled chicken to slash calories. Skip cheese and bacon to cut fat. Load up on veggies for fiber and pick water over soda.
Why Does Sodium in These Burgers Matter Too?
Many burgers, like Whataburger’s Triple Meat at 1,950 mg sodium, nearly hit a day’s limit. High sodium risks bloating and hypertension. Sauces and processed cheese are the worst offenders.
How Often Is It Okay to Eat These Without Major Risks?
Once a month is fine if your diet’s otherwise solid. Balance with exercise and greens to keep things in check.
Feeling sluggish post-burger? Time to space them out.
What Other Hidden Dangers Lurk in Fast-Food Burgers?
Preservatives in processed ingredients may cause reactions in some. Sugary sauces add empty calories, and high fats might trigger acne or mental fog.
Hat Tips
https://www.yahoo.com/lifestyle/articles/10-highest-calorie-fast-food-165018019.html (Published: Jul 30, 2025)
https://www.delish.com/food-news/a63980516/highest-calorie-fast-food-menu-items/ (Published: Mar 5, 2025)
https://foxsportsradio.iheart.com/content/2025-07-10-10-least-healthy-fast-food-chains-revealed/ (Published: Jul 10, 2025)
https://www.webmd.com/diet/ss/slideshow-fast-food-your-body (Published: Jun 6, 2025)
https://pmc.ncbi.nlm.nih.gov/articles/PMC6146358/ (Published: Apr 3, 2018)
https://health.clevelandclinic.org/heres-how-fast-food-can-affect-your-body (Published: Jan 28, 2021)
https://utswmed.org/medblog/high-fat-foods-heart/ (Published: Jun 13, 2018)
https://www.eatthis.com/side-effects-burger/ (Published: Jul 1, 2022)
https://www.reddit.com/r/nutrition/comments/10h3099/why_is_a_burger_unhealthy_and_in_which_ways/ (Published: Jan 20, 2023)
https://www.health.harvard.edu/blog/impossible-and-beyond-how-healthy-are-these-meatless-burgers-2019081517448 (Published: Jan 24, 2022)
https://www.eatthis.com/best-quality-fast-food-burgers-taste-test/ (Published: Aug 27, 2024)
https://en.wikipedia.org/wiki/Heart_Attack_Grill (Published: 2025-10-16 20:51 PDT)
Whataburger Nutrition PDF: https://wbimageserver.whataburger.com/Nutrition.pdf
Sonic Menu: https://order.sonicdrivein.com/menu/burgers/product/supersonic-double-cheeseburger
Shake Shack Nutrition: https://shakeshack.com/sites/default/files/2021-09/SHA_NutritionFacts_ShakeShack-tables-August%252031%2C%25202021%2520.pdf
Article Compiled and Edited by Derek Gibbs on October 18, 2025 for Clownfish TV D/REZZED