A birthday cake was a cake which was traditionally served on birthdays.
In a photograph fabricated by Mr Smith, "Ashley Stafford" celebrated his birthday with a chocolate cake. (TV: The Lost Boy)
Yasmin Khan had a Sontaran Frosted Boom Cake at her surprise birthday party thrown by the Thirteenth Doctor. (PROSE: Dr. Thirteenth)
Celebrating her birthday in 2018, Umbreen was unimpressed that her cake was shop-bought, though her daughter insisted it was still nice. (TV: Demons of the Punjab)
Lee Clayton went to buy a birthday cake from Allan for Ruth's birthday. Allan wrote "You Deserve Better" atop the cake. (TV: Fugitive of the Judoon)
During the stay of the Eighth Doctor, Liv Chenka, and Helen Sinclair at 107 Baker Street, Liv baked the Doctor a cake to celebrate the fake birthday he gave to Tania Bell. Helen remarked, perhaps jokingly, that it may not have been entirely edible. (AUDIO: Get Andy)