[@Juvvie] I am planning on playing a newcomer so at the start her powers would be quite primitive.

The basics are simple, the power to create and manipulate pastries. The character's most fundamental battle strategy is to be a nuisance, not only overpowering senses such as vision and smell with a barrage of desserts but also making the floor slippery, disrupting fire users or even water users.
One of her spells would be to create very hard bread that acts as either as a shield of limited durability or to bash someone, nothing too crazy, below a wood stick in impact.

Latter spells could include making really large pies that could cushion someone's fall or be an obstacle, creating chocolate bombs covering people in chocolate that hardens over time or even an ultra-specific short range teleport ability in which she can burst out of large enough cake as if it was a pop out cake. As a few examples.

Basically, a utility toolset with no real "punching" power but that is quite flexible.