Source: West Virginia Department of Agriculture (WVDA). Cottage food laws change often — confirm current rules before selling.
Since 2018 the WVDA (not local health depts) registers farmers-market cottage vendors. Almost any non-PHF food sellable from any in-state venue incl. online/mail; no cap.
Outgrowing cottage food? When you need a licensed kitchen, see West Virginia food-business requirements, estimate the build with the cost-to-open calculator, and check whether you need a hood.
Local food-permit cost, plan review and the health-department contact for the counties people look up most.