This is the 18019th most frequent Russian word.
фирменные
Branded or signature.
Here, 'фирменные' refers to jeans that are branded, showcasing their origin from a specific, recognized company.
Я купил фирменные джинсы.
I bought branded jeans.
In this context, 'фирменные' describes dishes that are uniquely associated with her culinary style or specialty.
Её фирменные блюда были невероятно вкусными.
Her signature dishes were incredibly tasty.
Here, 'фирменные' signifies drinks that the café uniquely offers as part of its menu.