Final answer:
The cookie made with coconut and egg whites is a Macaroon, which is distinct from Snickerdoodles, Biscotti, or Shortbread due to its unique ingredients.
Step-by-step explanation:
The main ingredients in the cookie mentioned, which are coconut and egg whites, correspond to a Macaroon. Macaroons are a type of light, baked confection characterized by a coconut base, often whipped with egg whites and sugar, which gives the cookies their distinctive chewy texture. The combination of coconut and egg whites is unique to macaroons, differentiating them from other cookies such as Snickerdoodles, Biscotti, or Shortbread, which may contain ingredients like flour, butter, sugar, vanilla, baking soda, eggs, and chocolate chips, but do not typically include coconut.