What is the difference between a macaron and an amaretti biscuit? Other than differing in origin (Italian (amaretti) and France (Macaron)), what is the difference between these two biscuits?
According to this article the main difference is that French macaroons are usually sandwiched together and enjoyed alone while amaretti (pre-cursor to French macaroons) are used both as a cookie and often as an ingredient.  Both are prepared from almond paste and meringue.