The ultimate soft shell crab sandwich keeps it simple and simply perfect in all the right ways. It utilizes just a few top-shelf ingredients — brioche bun, perfectly ripe tomato, soft leaf lettuce, and Japanese mayo (or regular mayo if you insist) — so your gorgeous sautéed crab can take center stage.
2center slices from a largebeautifully ripe tomato
2leavessoft lettuce
Instructions
Sprinkle the flour onto a plate and dredge each crab lightly in the flour.
Heat butter and oil in a heavy 12-inch skillet over medium heat.
Add the crabs belly up in a single layer. Cook for five minutes on the first side, then flip and cook for three minutes on the other side.
Lightly toast brioche buns. I like to do this in the toaster oven, but you could do it right in the pan after removing the crabs if you like.
Spread some Kewpie mayo (or regular mayo if you insist) onto the inside of the top bun. Layer crab, tomato, and lettuce onto bottom bun.
Close sandwich and serve.
Notes
Soft shell crabs are like crabs and potato chips all in one. And they're quick and easy to cook at home, promise. They're not a different variety of crab but rather creatures of a moment in time. These crabs have recently molted, and their new shells are still so soft as to be edible. Buy very fresh crabs from a source you trust, and ask the fishmonger to clean them for you. Learn more about them here.
Safflower oil is my high-smoke-point, neutral-tasting vegetable oil of choice. You can substitute another oil that has similar properties, such as canola, sunflower, peanut, corn, or vegetable oil blend.
For a dairy-free version of this recipe, simply omit the butter and double the oil.
You can use any sandwich roll that you like, but I'm a big fan of brioche hamburger buns for a quick and easy way to level up.
Regular mayo is fine, but Japanese mayo is better. Kewpie is creamier, tangier, and more umami-fied than American mayo. It’s made with egg yolks instead of whole eggs and has a slightly thinner consistency.
It only takes about 20 minutes to put this recipe together, so I prefer to make it right before serving. That said, these sandwiches also make great picnic food. Feel free to prep, pack, and picnic.
If you have leftovers, store them tightly sealed in the fridge for a day or two max.
I first published this recipe here in 2018. I've updated the post for clarity, but the recipe remains the same.