Source: Montana DPHHS / local health (largely deregulated). Cottage food laws change often — confirm current rules before selling.
Food-freedom law: direct-to-informed-consumer only, must be consumed in a home or at certain events; no cap; label/verbal disclosure that food is unregulated required.
Outgrowing cottage food? When you need a licensed kitchen, see Montana 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.