Plain peanut butter is gluten-free — and every major brand (Jif, Skippy, Smucker’s, Justin’s, Once Again) confirms it.
Yes. Plain peanut butter is just ground peanuts, oil, salt, and sometimes a little sugar — peanuts are a legume, not a gluten-containing grain. Jif (vast majority certified gluten-free), Skippy (formulated without gluten), Smucker’s Natural, Justin’s (GFCO-certified), and Once Again (certified, dedicated peanut facility) are all gluten-free. The real exceptions are deliberate wheat add-ins — Skippy P.B. Bites, Justin’s pretzel snack packs, and any pretzel-swirl or cookie-piece “dessert” peanut butter — plus the shared-knife double-dip at home.
Plain peanut butter is gluten-free, and that holds across every major brand on the shelf. Peanuts are a legume, not a grain, so a standard jar of creamy or crunchy has nothing for gluten to hide in. The only peanut butters that aren’t gluten-free are the ones that deliberately add wheat — and they’re easy to spot once you know what to look for.
Why Plain Peanut Butter Is Gluten-Free
Classic peanut butter is ground roasted peanuts with a little oil and salt; many jars add a touch of sugar. Per FDA labeling rules, the gluten-containing grains are wheat, barley, rye, and their hybrids — peanuts are a legume and none of the standard peanut butter ingredients is on that list. “Natural” peanut butter (often just peanuts and salt) and regular peanut butter differ only by added oil or sugar, neither of which is a gluten grain, so both are gluten-free.
Powdered peanut butter (PB2-style) follows the same logic: it is defatted ground peanuts with sugar and salt — still no gluten-containing grain — so plain powdered peanut butter is gluten-free too. The only thing that ever introduces gluten into peanut butter is a deliberately added wheat-based ingredient, which is the exception, not the rule.
Brand-by-Brand: Is Your Peanut Butter Gluten-Free?
Here’s where the major brands actually stand, based on each company’s own allergen and FAQ statements. The pattern is consistent: plain peanut butter is gluten-free everywhere; the only “no” entries are products that intentionally add wheat (pretzel or cookie pieces).
| Brand / Product | Gluten-Free? | What the brand says |
|---|---|---|
| Jif — Creamy, Crunchy, Natural, Simply, Reduced Fat | ✓ Certified GF | “The vast majority of our peanut butters are certified gluten free.” Check the back-label claim on your jar. |
| Skippy — Creamy, Super Chunk, Natural, Reduced Fat | ✓ Yes | Formulated without gluten-containing ingredients; considered gluten-free. |
| Skippy P.B. Bites | ✗ Not GF | Contain wheat flour — these are the exception in the Skippy line. |
| Smucker’s Natural — Creamy & Chunky | ✓ Yes | Just peanuts and a dash of salt; Non-GMO Project Verified, no gluten ingredients. |
| Justin’s — Classic & Honey Peanut Butter | ✓ Certified GF | GFCO-certified, like all Justin’s products. |
| Justin’s Nut Butter + Pretzel Snack Packs | ✗ Not GF | The pretzel component contains wheat — the one GFCO exception. |
| Once Again — all peanut butters | ✓ Certified GF | Certified gluten-free; made in a dedicated peanut-only facility. |
| Peter Pan — Creamy & Crunchy | ✓ Check label | Standard jars list only peanuts/sugar/oil/salt; confirm the on-pack label. |
| MaraNatha / Santa Cruz Organic | ✓ Check label | Single-ingredient or organic peanut butter, no gluten ingredients; verify the specific jar. |
| Store / generic (365, Trader Joe’s, Great Value, Adams, Teddie) | ✓ Check label | Plain peanut butter with no gluten grain; look for a gluten-free claim to be sure. |
| Powdered PB (PB2 & similar, plain) | ✓ Check label | Defatted peanuts + sugar + salt; gluten-free. Verify flavored powders. |
| Any pretzel-swirl / cookie-piece “dessert” PB | ✗ Not GF | The added pretzel or cookie pieces are wheat — assume not gluten-free. |
Cross-Contamination Risk
Manufacturing
Low
- Ground peanuts and oil, not a gluten grain.
- Major brands confirm no gluten-containing ingredients.
- Once Again uses a dedicated peanut-only facility.
Added-Ingredient Products
Medium
- P.B. Bites, pretzel snack packs add wheat flour.
- Pretzel-swirl / cookie-piece jars contain wheat.
- Read the label on anything that isn’t plain.
Home
Medium
- Bread-crumbed knife double-dip contaminates a shared jar.
- Use a clean utensil or a dedicated GF jar.
- Label a household “GF only” jar if you share a kitchen.
Plain vs. Natural vs. Powdered — All Gluten-Free
- Regular peanut butter (Jif, Skippy, Peter Pan) — gluten-free; peanuts, oil, sugar, salt
- Natural peanut butter (Smucker’s Natural, Adams, store natural) — gluten-free; usually just peanuts and salt
- Organic / single-ingredient (Once Again, MaraNatha, Santa Cruz, Crazy Richard’s) — gluten-free; check for a GF claim
- Powdered peanut butter (PB2-style, plain) — gluten-free; defatted peanuts, sugar, salt
- Pretzel / cookie / “P.B. Bites” style — NOT gluten-free (added wheat)
What to Look For — Or Avoid
- Ingredient list of just peanuts (and maybe oil, salt, sugar)
- A “gluten-free” or GFCO claim on the jar (fastest confirmation)
- A clean utensil or dedicated GF jar in a shared kitchen
- “P.B. Bites,” pretzel, or cookie-piece products (added wheat)
- Limited-edition “dessert” peanut butters without a label check
- Double-dipping a bread-crumbed knife into a shared jar
Frequently Asked Questions
Is peanut butter gluten-free?
Yes. Plain peanut butter is peanuts (a legume), oil, and salt — none of which is a gluten-containing grain. It is naturally gluten-free, and every major brand confirms its standard peanut butter contains no wheat, barley, or rye.
Is Jif peanut butter gluten-free?
Yes. Jif states that the vast majority of its peanut butters are certified gluten-free, including Creamy, Crunchy, Natural, Simply Jif, and Reduced Fat. Jif asks consumers to check the gluten-free claim on the back label of the specific jar for the most accurate confirmation.
Is Skippy peanut butter gluten-free?
Yes. Skippy peanut butter is formulated without gluten-containing ingredients (Creamy, Super Chunk, Natural, Reduced Fat). The one exception in the Skippy line is Skippy P.B. Bites, which contain wheat flour and are not gluten-free.
Are Justin’s and Once Again peanut butter gluten-free?
Yes — both are certified. Justin’s peanut butters are GFCO-certified (all Justin’s products are, except the Nut Butter + Pretzel Snack Packs). Once Again’s peanut butters are certified gluten-free and made in a dedicated peanut-only facility.
Which peanut butters are NOT gluten-free?
Only products that deliberately add wheat: Skippy P.B. Bites, Justin’s Nut Butter + Pretzel Snack Packs, and any pretzel-swirl or cookie-piece “dessert” peanut butter. The plain peanut butter itself is always gluten-free; the added pieces are the gluten.
Is natural or powdered peanut butter gluten-free?
Yes. Natural peanut butter (such as Smucker’s Natural) is usually just peanuts and salt, and plain powdered peanut butter (PB2-style) is defatted peanuts with sugar and salt — neither contains a gluten-containing grain. Check the label only on flavored powdered versions.
Can shared peanut butter get contaminated?
Yes. The most common home risk is double-dipping a knife that touched gluten bread back into a shared jar. Use a clean utensil each time, or keep a dedicated gluten-free jar labeled for the celiac household member.