3 Ingredient Peanut Butter Cookies Recipe (No Flour)
Peanut butter, sugar, one egg. That is the entire list, and the cookie is genuinely good rather than a compromise. The catch is that nothing in it holds the cookie together while it is hot, so the cooling step matters more than the baking.
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Why You'll Love This Recipe
- Mixed in one bowl with a spoon, on the tray in under 10 minutes
- No flour, no butter, no chilling the dough
- Naturally gluten free and dairy free without any special ingredients
- 18 cookies from one jar-and-a-bit of peanut butter
Press the fork marks lighter than you would on a normal cookie. Regular peanut butter cookies have gluten holding the dough across those grooves.
These have nothing, so a deep press creates a fracture line, and the cookie splits along it the moment you lift it. Go about halfway down, just enough to flatten to a bit over 1/2 inch.
Faint marks and an intact cookie beat a sharp pattern in four pieces.
Read Before You Start
Do not cut the sugar. A full cup looks excessive for 18 small cookies, and it is the single most common change people make. In a normal cookie sugar is mostly flavour. Here it is structure. Cut it to half a cup and you will get 18 warm crumbs on a tray.
Use shelf-stable creamy peanut butter. Natural peanut butter separates, and there is no flour in this dough to absorb the loose oil. The cookies go greasy and spread into thin sheets.
Ingredient Deep Dive & Notes
Creamy peanut butter, 1 cup (258 g). Shelf-stable, levelled not heaped. This is the flour, the butter and the flavour all at once. The ground peanut solids act as the dry structure, which is the only reason a flourless cookie holds shape at all. Crunchy works and adds texture, but the nut pieces interrupt the matrix, so expect a more fragile cookie.
Granulated sugar, 1 cup (200 g). White, not brown. Brown sugar has more moisture and less crystalline structure, and in a flourless dough that means a cookie that spreads and stays soft in a floppy way rather than a chewy one. If you want the chewy brown-sugar version, that recipe needs flour, and it is our Chewy Peanut Butter Cookies.
One large egg, room temperature. The only binder. A cold egg does not disperse evenly through stiff peanut butter, and you end up with wet streaks and dry patches in the same batch.
That is the whole list. Salt and vanilla are common additions and they do improve the flavour, but they take you to four or five ingredients, so they stay optional here. If you add vanilla, use alcohol-free.
Equipment Needed
- A 1. 5 tablespoon cookie scoop, for even bake times
- Light-coloured baking sheets. Dark pans brown the bases fast, and there is no flour here to buffer that
- A fork with flat, evenly spaced tines
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Three ingredients for flourless peanut butter cookies: creamy peanut butter, granulated sugar and one egg
Detailed Step-by-Step Cooking Guide
1. Heat the oven and line the sheets
2. Stir everything together
3. Scoop and space generously
4. Fork press, gently
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Pressing cookie dough balls gently with a fork to form criss-cross marks
5. Bake 9 to 10 minutes
6. Cool completely on the sheet
Getting the Texture Right
Moved too early, or the fork press went too deep, or both. Give them the full 10 minutes on the sheet.
Sugar was reduced, or the peanut butter cup was heaped. Both throw the binder ratio off.
Natural peanut butter, or the oven ran cool. A cool oven melts the sugar long before the egg sets.
A genuine limitation of the recipe rather than a mistake. You can go down to 3/4 cup of sugar and still get a cookie that holds, though it will be more delicate. Below that you need flour, which means a different recipe.
Dark pans. Drop the oven 15°F and use light sheets.
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Close up texture of a broken 3-ingredient peanut butter cookie showing tender interior
How to Use These Cookies
How to Serve, Store & Reheat
Fully cooled, at room temperature. Warm ones taste great but will not survive being picked up.
Airtight at room temperature for up to 5 days. Layer parchment between them, since they are more fragile than a standard cookie. Do not refrigerate.
Not really needed. If you want them warm, 3 minutes at 300°F (150°C) and let them cool a few minutes on the tray again before lifting.
Yes, both ways. Freeze baked cookies in a rigid container with parchment between layers for up to 2 months, and thaw at room temperature. You can also freeze the scooped balls, then bake from frozen at 350°F for 11 to 12 minutes, fork-pressing while they are still hard.
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Stack of 3-ingredient peanut butter cookies on a plate ready to serve
Dietary Variations
3/4 cup is the floor. Expect a softer, more delicate cookie and a longer rest on the sheet.
One flax egg (1 tablespoon ground flaxseed plus 3 tablespoons water, rested 5 minutes) will work, but be realistic about it. Flax binds less firmly than egg, so these come out noticeably more crumbly and need 15 minutes on the sheet rather than 10.
Sunflower seed butter substitutes cup for cup. Without baking soda in this recipe, the usual green discolouration is not an issue.
The reason this works without flour is that peanut butter already contains the two things flour normally supplies.
Ground peanut solids are roughly 25 percent protein and carry fibre and starch, so they behave like fine particles suspended in fat, which is close to what flour does in a creamed dough.
The egg coagulates around those particles as it heats, and the sugar melts and then recrystallises on cooling into a rigid glassy matrix that locks the whole thing in place.
That third part is why sugar cannot be treated as a flavour ingredient here. Remove a third of it and you remove a third of the scaffolding, which is exactly the amount most people cut.
Allergen Notice: This recipe contains peanuts and egg. It contains no wheat and no dairy. Substitutions for the peanuts and the egg are listed above. Ingredient brands and shared equipment vary, so anyone cooking for a diagnosed allergy should check every label themselves, including the peanut butter jar for cross-contamination statements. This is not a claim that any version is safe for a specific allergy, and peanut allergies in particular can be severe.
Frequently Asked Questions
Recipe Visual Gallery (5 Full Photos)
Recipe Card & Steps
Ingredients Checklist
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- 1 cup(258 g) creamy shelf-stable peanut butter, levelled
- 1 cup(200 g) granulated sugar
- 1large egg, room temperature
- 1/4 tspfine salt (optional)
- 1 tspalcohol-free vanilla extract (optional)
Step-by-Step Instructions
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Heat the oven to 350°F (177°C) and line two baking sheets with parchment. Do not grease the pans.
Stir the peanut butter, sugar and egg together in one bowl for about 1 minute, until uniform with no streaks of egg. Stir in the salt and vanilla now if using.
Scoop 1.5 tablespoon balls onto the sheets, 2 inches apart.
Press each ball with a fork, then again at a right angle, flattening to just over 1/2 inch thick. Press only about halfway down.
Bake 9 to 10 minutes per sheet. The edges should look dry and set and the tops should have lost their shine. The centres will still feel soft.
Leave the cookies on the hot sheet for a full 10 minutes without moving them, then transfer to a wire rack to finish cooling completely.
Recipe Card Notes & Tips
- Do not reduce the sugar below 3/4 cup. It is structural, not just sweetener, and cutting it is the most common cause of cookies that crumble.
- Use shelf-stable creamy peanut butter rather than natural, since there is no flour here to absorb separated oil.
- Freeze scooped balls and bake from frozen at 350°F for 11 to 12 minutes.
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