I don’t see many truly sweet western-style brownies or brownie shops. Here is a sweet western shop that tastes great even though not as sweet as western brownies. And I always wonder how they even survive.
A good concept might to be have a small tiny shop with one or two tables and try to sell brownies to passers-by in a high pedestrian traffic area.
Establish a name and come up with some time of enticing delivery concept.