Prompt: Octane render. Rococo style portrait of Marie Antoinette as a cake with delicate ornate frosting, with a cut slice of cake on a plate. Detailed face, delicate face, detailed large eyes. Beautiful patterns and colors. Chinoiserie wallpaper. Mix of realism and fantasy.

Rococo style. Jean-Baptiste Monge, Margaret Keane, John Williams Waterhouse, Fragonard, Thomas Gainsborough.

Perfect composition, sharp focus, smooth, rule of thirds, golden ratio. 
Negative prompt: Two heads.