Utah Cottage Food Prohibited Foods: TCS Items You Can't Sell From Home

Utah's Traditional Cottage Food Program allows a solid range of shelf-stable products, but the list of what you can't sell is longer than most people expect. The dividing line is TCS classification — Time/Temperature Control for Safety — and UDAF enforces it strictly. One prohibited ingredient in an otherwise approved recipe disqualifies the entire product.

What TCS Means and Why It Matters

TCS foods are products that support rapid bacterial growth when held between 41°F and 135°F (the "danger zone"). They require refrigeration or hot holding to stay safe. Under UDAF Rule R70-560, residential kitchens don't have the commercial-grade temperature monitoring equipment to handle these safely for commercial distribution, so all TCS foods are banned from the Traditional Cottage Food pathway.

For products near the TCS boundary, UDAF requires written confirmation that the product is non-TCS, typically showing a water activity (aw) of 0.85 or below or a pH of 4.6 or below.

The Full List of Prohibited Items

Frostings and fillings:

• Cream cheese frosting (the most common disqualifier for custom cake makers)
• Custard
• Lemon curd
• Meringue (contains uncooked egg)
• Whipped cream
• Any frosting containing dairy cream or uncooked eggs

Toppings and garnishes:

• Fresh fruit toppings or garnishes (fresh strawberries on a cake, fresh berries on a tart)
• Fresh vegetable inclusions (fresh jalapeños, fresh tomatoes in bread)
• Fresh cut fruit of any kind

Proteins:

• All meat and poultry products
• Fish and seafood
• Eggs (as a standalone product; eggs as a baked-in ingredient are fine)

Dairy:

• Raw unpasteurized milk or dairy products
• Any product requiring refrigeration due to dairy content

Preparation methods:

• Fried foods (frying is prohibited; only dry-heat methods like oven baking and skillet are allowed)
• Steamed products

Preserves and canned goods:

• Low-acid canned vegetables
• Fruit butters
• Sugar-free or no-sugar-added jams and jellies
• Fermented vegetables (kimchi, sauerkraut) without process authority approval
• Acidified hot sauces without lab validation

Other:

• Any product requiring refrigeration for safety

The Cream Cheese Frosting Trap

This one trips up more home bakers than any other rule. You can bake a beautiful three-layer cake in your cottage food kitchen, but the moment you frost it with cream cheese frosting, the entire product becomes TCS and is prohibited under R70-560.

Your options:

• Switch to shelf-stable buttercream made without dairy cream or cream cheese. American buttercream (butter, powdered sugar, vanilla) is generally non-TCS.
• Use the Homemade Food Act instead. HB 181 has no TCS restriction — cream cheese frosted cakes are fully legal for direct-to-consumer sales. You lose the ability to sell wholesale to stores, but you gain full recipe freedom.

Gray Area Products That Need Lab Testing

Some products sit right on the TCS boundary. UDAF requires you to submit these for laboratory testing or process authority validation before they can be approved:

• Sourdough starters — Must be commercially manufactured or lab-tested to confirm a stable pH of 4.0 or below
• Low-sugar jams — If your recipe uses significantly less sugar than standard proportions, you need water activity testing to prove aw ≤ 0.85
• Specialty preserves — Anything close to the pH threshold needs written confirmation from a UDAF-approved lab
• Flavored oils or infused vinegars — Vinegars are permitted but must be strained/filtered; infused oils with garlic or herbs can create anaerobic environments that support botulism

Lab testing through UDAF typically costs around $20 for a standard pH analysis, and turnaround is 7–14 days.

What Happens If You Sell a Prohibited Item

UDAF inspectors review your product list and recipes during registration and during inspections. If a prohibited ingredient is found in a product you're selling, the consequences range from:

• Immediate removal of that product from your approved list
• Required reformulation and resubmission for approval
• Potential permit suspension if the violation is repeated or poses a public health risk

The safer approach is to get your recipes reviewed and approved before you start selling — which is exactly what the UDAF registration process is designed to do.

Our Utah Cottage Food & Home Food Business Guide includes a complete allowed vs. prohibited foods reference chart and a recipe compliance checklist that helps you verify every ingredient before submitting your UDAF application.

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