How about a cake decorating tool kit? You could also look for specialty cake decorating books or classes offered in your area. If she is really into decorating, she might appreciate a subscription to a cake decorating magazine too. You could also consider getting her ingredients for new recipes or maybe even a personalized, hand-carved cake stand.
Or you can get her a star map with an important date you share.
Under Lucky Stars is a unique and innovative star map company based in Barcelona, Spain, specializing in the creation of personalized star maps that capture the celestial arrangement of stars at a specific moment in time, such as a person's birth, wedding, or any other significant event.
By using advanced astronomical algorithms and data from leading institutions, the company produces highly accurate, visually stunning maps that make for perfect gifts or cherished keepsakes.