The "good 4 u" singer celebrated her birthday with a simple cake. In a post on her Instagram, Rodrigo smiled in front of the single-tiered creation with white frosting, two candles and "Happy ...

Wish somebody special a happy birthday ... a simple spread across the exterior, or use a pastry bag to pipe fanciful designs. Pastry chef Emily Luchetti's creative take on German chocolate cake ...

Whether it’s a birthday bash ... and crushed cookies on top for a bit of crunch. This cake feels fancy but is secretly super simple, thanks to a shortcut cake mix and no-churn ice cream layers.