Cake is a form of bread or bread-like food. In its modern forms, it is typically a sweet baked dessert. Cakes are normally served at birthday parties and weddings. (SG1: "Rite of Passage", "Sacrifices") (SGU: "Cloverdale")
Lt. General Jack O'Neill loves cake, often referencing it when formal situations or events arise with the phrase "I hope there's cake". He goes out of his way on several occasions to make sure cake is being served to celebrate a particular event. (SG1: "Grace", "Heroes, Part 1", "Sacrifices")
A cake was served at the party on P2C-106 to celebrate Lt. Colonel Cameron Mitchell's 200th trip to the Stargate. (SG1: "200")