The Great American Cake is a Portugal-based cake design brand associated with cake designer and author Julie Deffense. Located in Cascais, the business creates personalised wedding cakes and custom-order cakes, combining bespoke cake-making with a wider offer for home bakers and cake professionals. Its online shop stocks baking and decorating supplies, including cake mixes and icing, sugar paste, food colourings, cutters, moulds, piping tools, stands, packaging, and decorations for cakes, cupcakes, and sugar flowers. Customers can also find books, equipment, gift cards, and seasonal products.

Alongside its retail offering, The Great American Cake provides cake design courses, workshops, and events, inviting participants to develop their baking and decorating skills. The site features Julie Deffense’s books and recipes, as well as information about wedding cakes, orders, and contact details. With both practical supplies and educational experiences, the brand serves customers looking to create decorated cakes themselves as well as those seeking a personalised cake for a special occasion.