donut shop
A retail shop primarily selling fresh donuts, often with related pastries, coffee, or other complementary products.
A donut shop is a retail space whose primary offering is fresh donuts and often related pastries, coffee, or other products which complement donuts.
Fresh donuts are the primary product. Coffee and other pastries can be offered alongside them.
A general bakery with a few donuts does not establish the donut-shop specialization. The main offering distinguishes the two uses.