The country that invented the ice cream sandwich is the United States.
The United States invented the ice cream sandwich in the late 19th century and street vendors in New York City sold early versions of the ice cream sandwiches around 1899 and they sold the ice cream sandwiches under the name of "hokey pokeys" before the idea came to placing the ice cream between cookies.
The old name for ice cream sandwiches is "hokey Pokey's" or even "Hokey Pokers".
Ice cream sandwiches were originally sold on the streets of New York City in the 1890s using the name "Hokey Pokeys" and "Hokey Pokers".
The early versions of ice cream sandwiches consisted of a slab of vanilla ice cream that was served between two pieces of paper and only cost one cent.
The reason why ice cream sandwiches don't melt anymore is a result of a change in their formula which includes emulsifiers and stabilizers, like sugar gum and mono and diglycerides that create a more robust honeycomb like structure which is resistant to rapid melting.
The additives thicken the water phase and fortify the ice cream's air bubble structure and prevents the fat from destabilizing and allows the ice cream to retain it's shape and slow the melting process.
The best ice cream sandwich is FatBoy ice cream sandwiches.
Other popular ice cream sandwiches are Blue Bunny ice cream sandwiches, Trader Joe's dairy free ice cream sandwich, Alden's Organic Vanilla Bean Round Sammies ice cream sandwiches, Crav'n ice cream sandwiches and Van Leeuwen Double Chocolate Cheesecake ice cream sandwiches.