The Impossible sliders are a little more than double the price of the traditional sliders ($1.99 vs 77 cents).
White Castle already has a vegetarian slider, which it will continue to offer in addition to Impossible's.
We ordered one Impossible combo — which included two plant-based sliders, fries, and a soda — and a regular combo — which included four beef sliders, plus the fries and drink. We also asked for two extra Impossible sliders. It was a lot of food.
In total, the veggie combo with cheese cost about $8 and the other (without cheese) was $6.59.
We first tried the Impossible burgers, which looked much thicker than White Castle's normal square patties. They also weirdly looked more like meat than the beef ones.
Instead of beef, Impossible's burgers contain heme (the molecule that gives beef its reddish color and metallic flavor), textured wheat protein, and coconut oil, among other ingredients.
The startup is now able to offer its sliders at a relatively low price.
Previously, a larger version of the Impossible Burger was only available in higher-end restaurants, like Umami Burger and David Chang's Momofuku Nishi, for over $10.