What Is the Impossible Burger?
The Impossible Burger is the flagship plant-based patty from Impossible Foods, the Silicon Valley company that built its entire brand around one gimmick that turned out to actually work: a burger that looks like it's bleeding when you cut into it. The trick is soy leghemoglobin, a heme-containing protein produced by fermenting genetically engineered yeast, which mimics the iron-rich compound that gives real beef its color, smell, and some of its savory flavor.
Since its 2016 restaurant debut and 2019 grocery store launch, the Impossible Burger has become one of the most recognizable names in plant-based meat, sold in patty form at most major U.S. grocery chains and on menus at chains like Burger King (the Impossible Whopper) and White Castle. It's positioned less as a "health food" and more as a direct, no-apologies substitute for ground beef — something you cook the same way, season the same way, and eat the same way.
This review covers the standard frozen Impossible Burger patties sold in retail 2-packs, not the loose "Meat From Plants" ground format or Impossible's newer product lines like sausage or chicken nuggets.
Ingredients
According to Impossible Foods' own published ingredient disclosure, the Impossible Burger patty contains:
Water, soy protein concentrate, sunflower oil, coconut oil, and 2% or less of: natural flavors, methylcellulose, cultured dextrose, modified food starch, yeast extract, dextrose, soy leghemoglobin, salt, vitamin E (tocopherols), L-tryptophan, and soy protein isolate — plus added vitamins and minerals including zinc, niacin, thiamine, vitamin B6, riboflavin, and vitamin B12.
A few of these ingredients tend to raise questions, so it's worth addressing them directly:
- Soy leghemoglobin is not derived from any animal. It's made by inserting the gene for soy leghemoglobin into a yeast strain (Pichia pastoris), then fermenting the yeast the same way you'd brew beer. The animal-shaped molecule the gene comes from is a plant gene found in soybean root nodules — no animal tissue, blood, or byproduct is involved at any step.
- Methylcellulose is a plant-derived (wood pulp or cotton) thickener, unrelated to gelatin.
- Cultured dextrose and yeast extract are fermentation-derived flavor enhancers, both plant/microbial in origin.
The full formula does mean this is a fairly processed product — it's built from isolated proteins and starches rather than whole foods, which matters if you're optimizing for minimally processed eating rather than just avoiding animal products. If you want to double-check any individual ingredient on this list yourself, the spvegan.com ingredient checker is a fast way to confirm.
Is the Impossible Burger Vegan?
Yes — the Impossible Burger is vegan. Impossible Foods states plainly that none of its products contain animal-derived ingredients, and the company has built its business specifically around plant and microbial substitutes for animal products. Soy leghemoglobin, the ingredient most people ask about, is produced via genetically engineered yeast fermentation, not extracted from any animal source.
The product is also certified Kosher (Parve) and Halal, which independently confirms the absence of animal-derived material, since both certifications require ingredient-level verification. It is not certified organic, and because it relies on genetically engineered yeast for the leghemoglobin, it is not compatible with a Non-GMO Project Verified standard — that's a separate issue from veganism, but it's worth knowing if GMO-avoidance is also part of how you eat.
One caveat that applies to almost every fast-food and restaurant preparation of the Impossible Burger rather than the retail patty itself: cooking surfaces, shared grills, and toppings like mayo-based sauces or cheese can introduce animal products at the point of service. The packaged grocery patty, cooked at home, is straightforwardly vegan; ordering it at a restaurant requires the same due diligence you'd apply to any menu item.
Nutrition Facts
Here's how one Impossible Burger patty (4 oz / 113g, uncooked) compares to a Beyond Burger patty and to conventional ground beef at two common fat ratios:
| Nutrient | Impossible Burger | Beyond Burger | 80/20 Ground Beef | 90/10 Ground Beef |
|---|---|---|---|---|
| Calories | 230 | 230 | 287 | 199 |
| Protein | 19g | 21g | 19.4g | 22.6g |
| Total Fat | 13g | 14g | 22.6g | 11.3g |
| Saturated Fat | 8g | 2g | 8.9g | 4.5g |
| Carbohydrates | 9g | 8g | 0g | 0g |
| Sodium | ~370mg | 310mg | ~75mg | ~75mg |
| Iron | 25% DV | 25% DV | 12% DV | 14% DV |
A few things stand out. Protein is essentially on par with real ground beef across the board, which is unusual — a lot of plant-based products fall short here. Saturated fat is where the Impossible Burger separates from the Beyond Burger: Impossible relies more heavily on coconut oil, which pushes its saturated fat close to that of 80/20 beef, while Beyond's fat blend (canola and coconut oil plus cocoa butter "marbling") keeps saturated fat much lower. Sodium is the other number worth watching — at roughly 15-16% of the daily value per patty, it's meaningfully higher than an equivalent serving of unseasoned ground beef, which is nearly sodium-free before you add salt yourself.
Both plant-based patties get an iron boost from fortification (iron is added directly, and soy leghemoglobin itself is iron-rich), which is why they list higher iron than beef despite beef being a classic iron source.
Taste and Texture
This is where the Impossible Burger has built its reputation, and it mostly earns it. Raw, the patty genuinely looks like ground beef — pink-red, slightly marbled, with a texture that holds together and stretches similarly to fresh ground meat rather than crumbling like a bean-based veggie burger. Cooked, it browns on the outside, stays pink-ish in the middle if you don't overcook it, and produces actual sizzle and rendered fat in the pan.
Flavor-wise, it's savory and slightly metallic-umami in a way that reads as "meaty" rather than "vegetal," which is the whole point of the heme protein. It's not a perfect beef clone — the texture is a touch more uniform and slightly springier than coarsely ground beef, and there's a faint sweetness from the dextrose that a blind taste-tester might pick up on. But in a bun, with cheese, lettuce, and condiments, most people — vegan or not — describe it as the closest plant-based product to actual ground beef they've tried, and it's frequently the pick in blind taste tests against other plant-based burgers.
Where it can go wrong: overcooking dries it out faster than beef does, since there's no intramuscular fat rendering the same way, and it doesn't hold up as well to a very long simmer (chili, bolognese) as it does to a quick sear.
Impossible Burger vs. the Alternatives
| Product | Vegan? | Protein | Sat. Fat | Best For |
|---|---|---|---|---|
| Impossible Burger | Yes | 19g | 8g | Closest beef-like taste and "bleed" |
| Beyond Burger | Yes | 21g | 2g | Lower saturated fat, soy-free |
| 80/20 Ground Beef | No | 19.4g | 8.9g | Benchmark for comparison |
| Dr. Praeger's / MorningStar-style veggie burger | Usually vegetarian, check label | 10-13g | 1-2g | Lighter, vegetable-forward option |
Compared to the Beyond Burger specifically, the trade-off is fairly clean: Impossible wins on flavor authenticity and that signature "bleed," while Beyond wins on being soy-free and roughly a quarter of the saturated fat. If you're avoiding soy for allergy or preference reasons, Beyond is the obvious pick. If you're chasing the closest thing to an actual beef burger experience, Impossible is generally considered the stronger match.
Price and Where to Buy
The Impossible Burger retails at most major U.S. grocery chains — Kroger, Walmart, Target, Safeway/Albertsons banners, Whole Foods, and regional chains — typically as a 2-patty (12 oz) or larger multi-pack in the frozen or refrigerated meat-alternative case. List price generally lands in the $6-$8 range for a 2-patty pack, though it's frequently discounted, and Impossible Foods has cut suggested retail pricing over the past few years to close the gap with conventional beef. It's also widely available on restaurant menus, most famously as the Impossible Whopper at Burger King.
Who Should Buy the Impossible Burger?
It's a strong fit if you're a new or transitioning vegan who still craves the specific experience of a beef burger, if you're cooking for a mixed household where omnivores need convincing, or if you're hosting a cookout and want a plant-based option that won't feel like a compromise next to actual burgers. It's less ideal if you're managing sodium or saturated fat intake, if you have a soy allergy, or if you're specifically trying to eat less processed food — in which case a bean-, lentil-, or mushroom-based patty will get you closer to whole-food territory, just without the beef-like theatrics.
Final Verdict
The Impossible Burger still does what it set out to do: replicate the taste, look, and cooking behavior of ground beef closely enough to change a lot of minds about what plant-based meat can be. It's not without trade-offs — the sodium and saturated fat numbers mean it's a treat food rather than a health food, same as the beef it's replacing, and the soy and GMO-derived ingredients will be dealbreakers for a specific subset of shoppers. But judged on its own stated goal — tasting like beef — it remains one of the most convincing products on the market.
Rating: 8.2/10
