Allergen labeling isn't just a legal box to check, it's a genuine safety responsibility. For someone with a serious food allergy, an undisclosed allergen in your cookies or jam isn't an inconvenience, it can be a medical emergency. That's why federal law requires food labels to clearly disclose the major food allergens, now known as the "Big 9" after sesame was added to the original eight. As a cottage food vendor, understanding exactly what you must disclose, and how, protects your customers and keeps you compliant. This guide walks through the Big 9 allergens, how to disclose them on your labels, and the hidden sources that trip up many home food sellers.

Important: This article is general information for food vendors, not legal advice. Allergen and labeling rules are detailed and can change, so consult the FDA's resources and your state's requirements, and a professional if needed.

The short version: Federal law requires food labels to clearly disclose the major food allergens, the "Big 9": milk, eggs, fish, shellfish (crustacean), tree nuts, peanuts, wheat, soybeans, and sesame (added as the ninth). If your product contains any of these, you must disclose it clearly on your label, either within the ingredient list or in a separate "Contains" statement. Watch for hidden sources, like wheat in soy sauce or milk in certain additives. Accurate allergen labeling is both legally required and a serious safety responsibility, since undisclosed allergens can cause severe reactions. Disclose every major allergen your product contains, clearly and accurately.

This guide covers the Big 9, how to disclose them, hidden sources, and why accuracy matters so much.

What Are the Big 9 Allergens?

The Big 9 allergens are the major food allergens that federal law requires to be disclosed on food labels: milk, eggs, fish, shellfish, tree nuts, peanuts, wheat, soybeans, and sesame. These account for the vast majority of serious food allergic reactions, which is why they're specifically regulated.

The Big 9 major allergens:

• Milk — including dairy in all forms, common in baked goods, candies, and many products.
• Eggs — common in baked goods and many recipes.
• Fish — finned fish like salmon, tuna, and cod.
• Shellfish (crustacean) — like shrimp, crab, and lobster.
• Tree nuts — like almonds, walnuts, pecans, cashews, and pistachios.
• Peanuts — a legume, but a distinct and serious allergen.
• Wheat — common in baked goods and many products.
• Soybeans — including soy in various forms and additives.
• Sesame — the ninth allergen, added to the required list, including seeds and sesame-derived ingredients.

For most cottage food vendors, milk, eggs, wheat, tree nuts, peanuts, soy, and sesame are the most commonly relevant, since they appear frequently in baked goods, candies, and other homemade products. The FDA's guidance on major food allergens is the authoritative source on what must be disclosed. Knowing these nine allergens, and checking every product for them, is the foundation of compliant, safe allergen labeling.

How Do You Disclose Allergens on Your Label?

You disclose allergens on your label either by clearly naming them within your ingredient list or by including a separate "Contains" statement listing the allergens, both of which are accepted methods. Clarity is key, since customers with allergies must be able to quickly identify whether your product is safe for them.

Two accepted methods:

• Within the ingredient list. Name the allergen clearly in the ingredient list, for example, listing "wheat flour" makes the wheat clear, and "milk" or "butter (milk)" identifies milk.
• A "Contains" statement. After the ingredient list, add a statement like "Contains: wheat, milk, eggs, tree nuts (almonds)," listing the major allergens present.

Best practices for clear disclosure:

• Use the common name of the allergen, so it's easily recognized (for example, "milk" rather than only a technical dairy term).
• Specify the type of tree nut or fish where required, like "almonds" or "walnuts."
• Make it prominent and legible, so customers can find it easily.
• Be consistent across your products and labels.

Many vendors use a "Contains" statement because it's clear and easy for customers to spot, though naming allergens clearly within the ingredient list is also acceptable. The goal is that a customer with an allergy can immediately and reliably determine whether your product is safe. Our guide to cottage food labeling requirements covers how allergen disclosure fits with your other label elements, like your business info, ingredients, and net weight. Clear, accurate allergen disclosure is essential on every product that contains a major allergen.

What Are Hidden Sources of Allergens?

Hidden sources of allergens are ingredients that contain a major allergen in a way that isn't obvious, like wheat in soy sauce, milk in certain flavorings, or soy in various additives. These hidden sources trip up many home food sellers and can lead to dangerous undisclosed allergens.

Common hidden allergen sources to watch for:

• Wheat in soy sauce, some seasonings, malt, and certain thickeners.
• Milk in some chocolate, caramel, certain flavorings, whey, casein, and additives.
• Soy in lecithin (a common additive), some oils, and various ingredients.
• Eggs in some binders, glazes, and additives.
• Tree nuts or peanuts from cross-contamination or in ingredients like certain flavorings and oils.
• Sesame in some spice blends, tahini, and seeded products.

Why hidden sources matter:

• They're easy to miss. An ingredient you buy might contain an allergen you didn't realize, so read every ingredient label.
• The allergen must still be disclosed. A hidden allergen is still a required disclosure, so you must account for it.

The key defense against hidden allergens is reading the ingredient labels of everything you buy, since a purchased ingredient like a chocolate, a flavoring, or a seasoning may contain milk, soy, wheat, or another allergen. When you use such an ingredient, its allergens become part of your product and must be disclosed. This is why careful ingredient review is essential: you can only disclose what you're aware of, so knowing exactly what's in every ingredient you use is the foundation of accurate allergen labeling.

Why Does Allergen Accuracy Matter So Much?

Allergen accuracy matters so much because for someone with a serious food allergy, an undisclosed allergen can cause a severe or even life-threatening reaction, making accurate disclosure a genuine safety responsibility, not just a legal formality. This is one area where getting it right truly protects lives.

Why accuracy is critical:

• Reactions can be severe. Food allergies can cause anaphylaxis, a serious, potentially life-threatening reaction, so an undisclosed allergen is genuinely dangerous.
• Customers rely on your labels. People with allergies make eat-or-don't-eat decisions based on your disclosure, trusting it to be accurate.
• It's both legal and ethical. Accurate allergen labeling is legally required and a fundamental safety responsibility to your customers.
• Cross-contact matters too. If you handle allergens in your kitchen, cross-contact can introduce them into products, which is why noting your kitchen's practices helps allergy customers make informed choices.

Because the stakes are so high, treat allergen labeling with the seriousness it deserves: review every product and ingredient, disclose every major allergen accurately, and consider noting cross-contact if you handle allergens in your kitchen. Being transparent about your kitchen, for example, noting that you also process nuts, helps customers with allergies make informed, safe choices. Allergen accuracy protects your customers' health and your reputation, so it's worth the careful attention it requires on every product you sell.

How Do You Build Allergen Labeling Into Your Process?

You build allergen labeling into your process by reviewing every recipe and ingredient for the Big 9, disclosing all present allergens on every label, and staying consistent. Making allergen review a standard step ensures nothing slips through.

Steps to build it into your process:

• Review each recipe for the Big 9, identifying every major allergen your product contains.
• Read every ingredient's label to catch hidden allergens in purchased ingredients.
• Disclose all present allergens clearly on every product label, via the ingredient list or a "Contains" statement.
• Note cross-contact if relevant, especially if you handle multiple allergens in your kitchen.
• Keep your disclosure consistent across all products and updated when recipes change.
• Re-check when you change a recipe or ingredient, since a new ingredient may add an allergen.

Making allergen review a consistent part of creating and labeling every product is what keeps your disclosure accurate and reliable. When you introduce a new product or change an ingredient, re-checking for allergens ensures your labels stay correct. This diligence, combined with clear disclosure, protects your customers and keeps you compliant. The FDA's allergen labeling resources and your state's requirements guide the specifics, and building a consistent allergen-review habit into your process is the practical way to get it right every time.

How Homegrown Helps You Communicate Allergen Information

Beyond your physical labels, clearly communicating allergen and product information to customers helps them make safe choices, which is where a real storefront helps. Homegrown is $10 a month with no percentage fees beyond standard payment processing, and it gives you a storefront where you present clear product descriptions and information, letting you communicate what's in your products so customers with allergies can make informed decisions before they order.

How it compares to the alternatives:

• Instagram and Facebook DMs are free but make it hard to present clear, consistent product and allergen information.
• Etsy provides product listings, but its roughly 6.5% transaction fee cuts into margins, and it isn't built for local food pickup.
• A full website builder like Shopify provides listings too, but you're paying more monthly and building a whole store.

What Homegrown does well for communicating with customers: clear product descriptions where you present your ingredients and information, helping allergy customers make informed choices, and a fifteen-minute setup. What it doesn't do: it won't create your labels, ensure your allergen accuracy, or replace proper labeling and professional guidance. It gives you a place to clearly present your products alongside your compliant physical labels. When you're ready to present your products clearly, you can set up your storefront today.

What Allergen Labeling Mistakes Should Food Vendors Avoid?

The most serious allergen mistakes are missing hidden allergens and unclear disclosure. Because the stakes are safety, the errors that matter most involve completeness and clarity.

Mistakes to avoid:

• Missing hidden allergens. Purchased ingredients like chocolate, flavorings, and seasonings can contain allergens, so read every ingredient label.
• Forgetting sesame. Sesame is now the ninth required allergen, so disclose it in products that contain it.
• Unclear disclosure. Make allergen information prominent and easy to find, whether in the ingredient list or a "Contains" statement.
• Not specifying tree nut or fish types where required.
• Ignoring cross-contact. If you handle allergens in your kitchen, noting cross-contact helps allergy customers.
• Not re-checking after recipe changes. A new ingredient may add an allergen, so re-review when you change a product.

Getting these right protects your customers from dangerous reactions and keeps your allergen labeling compliant and trustworthy.

Frequently Asked Questions

What are the Big 9 allergens?

The Big 9 allergens are the major food allergens federal law requires to be disclosed on food labels: milk, eggs, fish, shellfish (crustacean), tree nuts, peanuts, wheat, soybeans, and sesame. Sesame is the ninth allergen, added to the original eight. These account for the vast majority of serious allergic reactions. If your product contains any of them, you must disclose it clearly on your label, since this is both legally required and a genuine safety responsibility to your customers.

How do I disclose allergens on my cottage food label?

You disclose allergens either by clearly naming them within your ingredient list, like "wheat flour" or "butter (milk)," or by including a separate "Contains" statement after the ingredients, such as "Contains: wheat, milk, eggs, tree nuts (almonds)." Both methods are accepted. Use common allergen names, specify tree nut and fish types where required, and make the disclosure prominent and legible so customers with allergies can quickly and reliably determine whether your product is safe for them.

What are hidden sources of allergens?

Hidden sources of allergens are ingredients that contain a major allergen in a non-obvious way, such as wheat in soy sauce, milk in some chocolate or flavorings, soy in lecithin, or sesame in some spice blends. Because purchased ingredients can contain allergens you might not expect, reading the label of every ingredient you use is essential. Any allergen present, even from a hidden source, must be disclosed on your product label.

Is sesame really required to be disclosed now?

Yes, sesame is now the ninth major allergen required to be disclosed on food labels, added to the original eight (milk, eggs, fish, shellfish, tree nuts, peanuts, wheat, and soybeans). This means products containing sesame, including sesame seeds, tahini, and sesame-derived ingredients, must disclose it. Many vendors overlook sesame since it's the newest addition, so be sure to check your products, especially seeded items and spice blends, for sesame and disclose it clearly.

Do I have to mention cross-contamination?

While the required disclosure is for allergens present in your product, noting cross-contact, for example, "made in a kitchen that also processes nuts", is a strongly recommended practice if you handle multiple allergens in your kitchen. It helps customers with severe allergies make informed choices, since cross-contact can introduce trace allergens. Being transparent about your kitchen's practices protects allergy-sensitive customers and builds trust, even where such advisory statements are voluntary rather than strictly required.

What happens if I don't disclose an allergen?

Failing to disclose an allergen is both a legal violation and a serious safety risk, since a customer with that allergy could have a severe or life-threatening reaction from an undisclosed allergen they trusted your label to reveal. Beyond legal consequences, an allergic reaction caused by your product is a devastating outcome you want to prevent. This is why accurate allergen disclosure is essential, treat it as the safety responsibility it is, and disclose every major allergen your product contains.

How do I keep my allergen labeling accurate?

You keep allergen labeling accurate by reviewing every recipe and ingredient for the Big 9, reading the labels of all purchased ingredients to catch hidden allergens, disclosing all present allergens clearly on every product, and re-checking whenever you change a recipe or ingredient. Building allergen review into your standard process ensures nothing slips through. Staying consistent across products and updating your disclosure when recipes change keeps your labeling reliable and safe for your customers.

Allergen labeling is where legal compliance and genuine safety meet: the Big 9, milk, eggs, fish, shellfish, tree nuts, peanuts, wheat, soybeans, and sesame, must be disclosed clearly on any product that contains them, including hidden sources. Review every product and ingredient, disclose accurately, note cross-contact where relevant, and treat this with the seriousness it deserves. Consult the FDA's guidance and your state's rules for specifics. And to clearly communicate your products to customers, set up a Homegrown storefront alongside your compliant labels.