In the 1950's my grandmother made a Chocolate Macaroon cookie with four ingredients: egg whites,powdered sugar, coarse cracker crumbs, and 1 whole box of DOT chocolate. I have never been able to find DOT chocolate, who manufactured it, or the quantity in 1 whole box. Any ideas? All 21 of my cousins remember this cookie. Granny lived in Cleveland, Ohio so perhaps local?