The term 'Dessert Square' refers to a type of dessert that is made up of a BROWNIE base and various toppings. The crossword solution for this term is 'BROWNIE, ' which is a seven-letter word. Brownies are a type of cake-like dessert that is usually made with cocoa powder, butter, eggs, and sugar. They are often served with ice cream, whipped cream, or other toppings. Dessert Squares are a variation of the traditional BROWNIE, where the BROWNIE base is topped with various ingredients such as nuts, chocolate chips, or marshmallows.