If your food requires refrigeration or temperature control to be safe, it's a TCS food — and that changes everything about what license you need. Here's a clear breakdown of what you can and can't sell from your home kitchen.
TCS stands for Temperature Control for Safety. It's the food safety industry's term for any food that supports the rapid growth of harmful bacteria when held in the "danger zone" — between 41°F and 135°F. Understanding TCS is the single most important concept for any Wisconsin home food seller.
A food is TCS if it meets three conditions: it has high moisture content, it has some protein or carbohydrate nutrient base, and it has a pH above 4.6. When all three are present, harmful bacteria like Salmonella, Listeria, E. coli, and Staphylococcus aureus can multiply rapidly at room temperature — doubling roughly every 20 minutes in ideal conditions.
The Wisconsin Food Code (ATCP 75) defines TCS foods and requires that they be kept cold (at or below 41°F) or hot (at or above 135°F) at all times. Selling TCS foods from an unlicensed home kitchen is not permitted under any of Wisconsin's current cottage food exemptions.
The cottage food exemptions in Wisconsin do not cover any TCS food. Neither the Kivirist baked goods ruling nor the Pickle Bill permits the sale of food that requires refrigeration or temperature control. If your product must be kept cold or hot to remain safe, a retail food establishment license and commercial kitchen are required before you can sell it.
The line isn't always obvious. Here's a reference list of common foods and whether they're TCS — and what that means for your license requirements.
Wisconsin's position on prepared meal sales is clear: no TCS food may be sold from an unlicensed home kitchen. Here's a category-by-category breakdown.
Smart workaround for bakers: If you want to include cream-style fillings in cakes, use shelf-stable alternatives. Swiss meringue buttercream, American buttercream (butter + powdered sugar), and ganache (chocolate + cream, baked into the cake structure) are generally considered non-TCS when used as an external frosting. Always check with DATCP if you're uncertain about a specific recipe component.
If your vision for your business includes hot meals, refrigerated products, or catering, a license is the path — not a barrier. Here's what the licensing process looks like in Wisconsin.
Wisconsin law requires any business operating a retail food establishment — defined as a permanent or mobile facility where food processing is conducted primarily for direct retail sale — to obtain a license from DATCP or an authorized local agent. This includes anyone selling TCS prepared meals, soups, hot foods, or refrigerated products for profit.
The license requires a commercial-grade kitchen that is separate from your personal home kitchen. It cannot share space with your residential cooking area. You must also pass an initial inspection and maintain ongoing compliance with the Wisconsin Food Code (ATCP 75).
Contact DATCP's Food and Recreational Safety Division to begin: (608) 224-4682 · datcp.wi.gov
You need access to a licensed commercial kitchen. Options include renting a shared/commissary kitchen by the hour, leasing dedicated commercial kitchen space, or building a licensed kitchen addition to your property (separate from your residential kitchen). Search for shared commercial kitchens in your area — they're more common than you might think in Wisconsin's strong food entrepreneurship ecosystem.
Before investing in a kitchen, contact DATCP's Food Safety division at datcp.wi.gov or (608) 224-4682. They can advise on kitchen requirements for your specific product line, licensing fees, and whether a local health department will be your licensing agent instead of the state.
DATCP or your local health department will require a plan review of your kitchen facility before issuing a license. This involves submitting floor plans, equipment lists, and information about your food processes. A pre-licensing inspection fee of approximately $40–$60 applies for new establishments.
Once your facility passes inspection, DATCP or your local health department will issue a retail food establishment license. Annual license fees vary by establishment type and sales volume — starting as low as $20 for small operations not engaged in food processing, up to higher tiers for larger operations. Renew annually.
Licensed establishments are subject to periodic unannounced inspections. Maintain food handler certifications (required for licensed operations), temperature logs, cleaning records, and supplier documentation. The Wisconsin Food Code (ATCP 75) is your operating standard.
Start cottage, scale licensed. Many successful Wisconsin food businesses start with home-baked goods under the Kivirist exemption — building a customer base, testing recipes, and generating revenue — then transition to a licensed commercial kitchen when the business is ready. The two tracks are not mutually exclusive: you can continue selling your baked goods while separately developing a licensed product line.
Enter your recipe or product type and get an instant assessment — TCS or non-TCS — along with guidance on which Wisconsin exemption applies and what steps to take next.
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