Brownies are dense, fudgy or cakey square or rectangular chocolate treats made from butter, sugar, chocolate or cocoa, eggs and flour, often studded with nuts, chocolate chunks or swirls of caramel or cream cheese. They sit somewhere between a cake and a cookie in texture and are typically cut into bars rather than sliced. They originated in the United States in the late 19th century, with several origin stories, most commonly credited to a cook who accidentally left out baking powder or to a chef who adapted a chocolate dessert for a Chicago women's club. Gaining popularity through cookbooks and mass produced mixes in the early 20th century before becoming a globally beloved bake.

Dulce de leche is a thick, caramel coloured sweet spread made by slowly heating sweetened milk until it caramelises, yielding a rich, creamy, toffee like flavour and makes the perfect addition to a brownie, gently swirled into the middle of them for a caramel centre.