Sealed crustless sandwich

A sealed crustless sandwich consists of a filling between two layers of crimp-sealed bread, with the crust removed.

Homemade variations are typically square, round, or triangular; the bread can vary, e.g., white or whole wheat; and the sandwiches can be homemade with common crimping techniques similar to pie crust, ravioli, or dumplings using readily available kitchen tools (e.g., a fork, small spoon or curved knife end to crimp the edges). A purpose-designed "cut and crimp" tool can also be used.

Mass-produced varieties vary in shape, are typically individually wrapped, frozen and packaged—and include proprietary brands as well as house brands. They were introduced in 1995 with peanut butter and jelly filling, followed by numerous patent and trademark disputes as well as numerous competitors entering the market.

The sandwiches offer easily-frozen and thawed, ready-to-eat, portable convenience and have been called, "the Swiss Army knife of foods".

Audience

Originally developed for as a prepared food for school lunches, they have appeal across generations and can easily be included in a homemade lunch. In 2018, sealed crustless sandwiches were made available to firemen during the California wildfires. National Football League teams buy tens of thousands of them for players to eat as snacks.

Mass production

In the United States, mass-produced crustless sealed sandwiches were introduced in 1995, in Fargo, North Dakota by David Geske and Len Kretchman—at the time marketing as Incredible Uncrustables to schools in the Midwest, with fifty employees making roughly 35,000 of the sealed sandwiches daily by 1998. Their company, Menusaver, was purchased by The J.M. Smucker Company in 1998. In Japan, Yamazaki Baking has marketed Lunch Pack sealed sandwiches since 1984.