The USA, Mexico, Cuba, Brazil, Indonesia, Japan, Portugal, Spain, Poland, Ukraine - this is just a short list of countries where they prepare their own versions of croquettes. Typically, the main ingredient of croquettes is mashed potatoes, and the method of preparing these golden cutlets is deep frying. This method makes the croquettes so crispy. Let's give you a hint: if you add cheese to the filling, they will also turn out chewy!