Small batch sauce co-packers: what to know before you ask for quotes

Step 1: Know how your sauce is classified

The federal acidified foods rule (21 CFR Part 114) is the one most sauce makers run into. In plain terms:

• Acid foods have a natural pH of 4.6 or below.
• Acidified foods are low-acid foods with acid or acid foods added, with a finished equilibrium pH of 4.6 or below and water activity above 0.85. Many pepper sauces, salsas and BBQ sauces are made this way, because peppers, onions and other vegetables are low-acid ingredients.
• Excluded from Part 114: foods stored, distributed and sold under refrigeration; carbonated beverages; jams, jellies and preserves; and acid foods such as condiment sauces and dressings that contain only small amounts of low-acid ingredients and whose pH doesn't differ much from the main acid ingredient.
• Low-acid foods (finished pH above 4.6, water activity above 0.85) sold shelf-stable in sealed containers fall under 21 CFR Part 113 and need a retort or aseptic process. Some cream- or cheese-based sauces land here, and far fewer small co-packers can run them.

Where your sauce falls isn't something to guess. A process authority reviews your formula and measured values and sets the scheduled process. Many university food science programs offer process authority reviews; some co-packers arrange one for you.

Step 2: Understand what an acidified-food plant has to do

If your sauce is an acidified food, the plant making it must:

• Register the facility with FDA as an acidified food processor and file a scheduled process (Form FDA 2541e) for each product in each container size. Adding a new bottle size later means a new filing.
• Make the product under the operating supervision of someone who has completed an FDA-approved acidified foods (Better Process Control) course.
• Keep pH and process records for every batch.

This is why it's worth asking early: "Will you file my scheduled process, and who pays for the process authority review?"

Step 3: Know the process the plant will use

Most shelf-stable acid and acidified sauces are made by hot fill and hold: the sauce is heated, filled hot into clean containers, capped, and inverted or held so the hot product treats the cap and headspace. The exact temperature and hold time come from your scheduled process, not a rule of thumb. Other options include adding permitted preservatives, refrigerated distribution, or (for low-acid sauces) retort processing.

Hot fill affects your package. Glass with a metal lug cap and a plastisol liner is the classic choice. Plastic bottles only work if they're rated for the fill temperature (heat-set PET, for example); standard PET isn't suitable.

Step 4: Define your package and volume

Be specific so every plant quotes the same thing:

• Container: woozy or other bottle shape, size in ounces, glass or plastic, color
• Closure: lug cap, continuous-thread cap, orifice reducer or dripper insert, tamper band or shrink band
• Label: who supplies it, label size, and whether the plant applies it
• Case pack and pallet pattern
• Batch size per flavor, number of flavors, and how often you'll reorder

Minimums: think in gallons per flavor

Sauce co-packers usually set minimums by batch size. Published minimums from small-batch sauce co-packers we found range from a few dozen gallons per flavor to a standard 100-gallon kettle batch, and larger plants run far more. Convert to bottles for your size (a 5 oz bottle and a 12 oz bottle give very different counts from the same batch), and ask each plant for its minimum per flavor, per run.

What to send each sauce co-packer

• Product type and a short description (style, texture, particulates, heat level)
• Formula status: final with measured pH and water activity, or still being developed
• Whether you already have a process authority letter or scheduled process
• Package details from Step 4
• Batch size per flavor, number of flavors, expected reorder size and frequency
• Ingredients you'll supply vs. ingredients the plant should source; any specialty peppers or imported items
• Allergens in the formula
• Certifications you need (organic, kosher, gluten-free, non-GMO) and any retailer audit requirement
• Target first-run date and ship-to location

Questions to ask before you commit

• Is my sauce an acidified food in your view, and will you file the scheduled process under your registration?
• Who arranges and pays for the process authority review?
• Who on your team completed the acidified foods (Better Process Control) course?
• What's your minimum batch per flavor, and can you combine flavors in one run day?
• Can your filler handle my viscosity and particulates (seeds, chunks, fruit pieces)?
• Which containers and closures can your line run, and can you hot fill plastic?
• What pH checks and records will I get for each batch?
• How do you handle allergens and changeovers between customers' products?
• Who owns the formula, and will you sign a confidentiality agreement?
• How far ahead do I book a run?

What goes into a sauce co-packing quote

Ask for these as separate lines:

• Per-unit or per-gallon co-packing fee
• Ingredients and packaging (if the plant sources them)
• Process authority, scheduled process filing, or new-product setup fees
• Batch or changeover fees
• Lab checks (pH, water activity)
• Labeling, case packing, palletizing
• Storage and outbound handling
• Deposit and payment terms

What drives lead time

• The plant's schedule. Many co-packers want production confirmed a month or more ahead.
• Process authority review and the FDA filing for a new product or container size
• Bottles, caps and labels, which often have longer lead times than the sauce itself
• Specialty ingredients, especially seasonal or imported peppers
• A first-run scale-up: a kitchen recipe often needs adjusting at kettle scale

How PostRequest helps

Describe your sauce once. Our agents shortlist co-packers that run acid and acidified products in your package, email each one your brief from a PostRequest address, follow up once, and line up the replies: price, minimums, lead time, and terms. Plants see your product and specs, not your name or company, until you choose to connect. During early access, a person on our team reviews every comparison before it reaches you.