However, here are some options you could use:
General Collective Nouns:
* A team of pastry chefs
* A crew of pastry chefs
* A group of pastry chefs
* A staff of pastry chefs
More Creative Options:
* A batter of pastry chefs (playful, referencing a key ingredient)
* A confection of pastry chefs (evoking the sweet creations)
* A glaze of pastry chefs (referencing the glossy finish on many desserts)
Ultimately, the best option depends on the context and the desired tone.