Sourdough peanut butter cookies combine conventional creamy peanut butter with a measured amount of mature starter discard. A two-hour refrigerator rest lets the dough firm before it is portioned and baked. A light sugar coating adds texture to the outside without requiring frosting.
These sourdough peanut butter cookies make approximately sixteen large cookies when portioned around fifty-five grams each. The yield follows the dough amount and scoop size rather than an arbitrary twelve-cookie label. Baking six at a time leaves room for spreading, so the time estimate allows three successive trays.
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Why This Recipe Works
Sourdough peanut butter cookies rely on creamed butter and sugar for a consistent base. Peanut butter and discard follow, then egg and vanilla, and finally the combined dry ingredients. Mixing stops when the flour is incorporated rather than continuing to beat the dough.
Chilling matters because discard adds moisture and softened butter makes the newly mixed dough loose. Starting with a measured mature starter helps keep the liquid balance more predictable. This is a cookie recipe, not a bread proofing schedule.
Ingredients for Sourdough Peanut Butter Cookies
Use the gram weights below for butter, both sugars, peanut butter, discard, and flour. Choose a stabilized creamy peanut butter whose oil is not separated; the formula is not written for a runny natural-style product. The listed sugar amount is part of the cookie’s structure.
For sourdough peanut butter cookies, use healthy discard from an established starter fed equal weights of flour and water. Keep the small rolling-sugar allowance separate from the sugar creamed into the dough. The optional extra pinch of salt can be left out if your peanut butter is already salty.
For the Cookie Dough
- 95 grams unsalted butter (softened) (Make sure the butter is softened.)
- 240 grams granulated sugar (For the dough; rolling sugar is separate)
- 40 grams brown sugar
- 125 grams creamy peanut butter (Conventional stabilized creamy peanut butter, without separated oil)
- 75 grams sourdough discard (Mature healthy discard; starter fed equal flour and water weights)
- 1 large egg
- 1.5 teaspoons pure vanilla extract
- 185 grams all-purpose flour
- 0.5 teaspoons baking powder
- 0.5 teaspoons baking soda
- 3/4 teaspoon fine salt (Add an extra small pinch only if desired)
For rolling
- 2 tablespoons granulated sugar (Separate from dough sugar; coat lightly)
How to Make Sourdough Peanut Butter Cookies
Cream softened butter, then beat in both sugars until the mixture is lighter. Add peanut butter and discard, followed by egg and vanilla. Whisk flour, leaveners, and salt separately and incorporate in two additions, scraping the bowl so no dry pockets remain.
Refrigerate sourdough peanut butter cookies dough at least two hours before portioning. Roll the balls in the separate sugar and place six on each parchment-lined metal tray. Bake at 375°F, checking near nine minutes. If using the original gentle pan-drop technique, it should settle puffed edges, not substitute for baking a raw center. Continue until the centers are just set and the edges have colored.
How to Serve
Cool sourdough peanut butter cookies briefly on the tray before moving them to a rack. They are fragile while hot and become firmer as they cool. A broad spatula helps lift them without bending the centers.
Serve at room temperature or slightly warm once properly baked. The recipe is complete without extra chips or nuts. If you bake one tray at a time, keep the remaining dough refrigerated and let the metal tray cool before loading another set.
Storage
Store sourdough peanut butter cookies in a covered container at cool room temperature for three to four days. Wait until they are fully cooled before sealing so condensation does not soften their surfaces.
Freeze baked cookies for up to two months with parchment between layers. Thaw covered. Chilled raw dough can be kept up to twenty-four hours before the written bake, but do not taste it; it still contains raw flour and egg.
Recipe and dough-chilling method credit: Amanda Paa, Heartbeet Kitchen, Sourdough Peanut Butter Cookies. For uncooked dough precautions, see FDA guidance on handling flour safely.
Tips and Variations
For sourdough peanut butter cookies, use a scale rather than switching every gram weight to an estimated cup. A packed flour cup and a loose flour cup can differ substantially, especially in a relatively moist discard dough.
Use a metal tray for any gentle pan-drop step and keep the movement small. Glass baking dishes and fragile cookware are not suitable. If you skip that optional handling, simply bake until set; do not assume a chewy texture means leaving visible wet dough in the middle.
Frequently Asked Questions
Does the discard need a fresh feeding?
No active rise is required for sourdough peanut butter cookies. Use mature healthy discard, and keep the specified equal-weight flour-and-water starter consistency.
Can I shorten the two-hour chill?
It is part of the method. A much shorter chill can leave the dough soft and change spreading, so include it in your preparation plan.
How many cookies are made?
Sourdough peanut butter cookies yield approximately sixteen large pieces around fifty-five grams each. Small differences in egg size and dough left in the bowl can affect the final count.
Can I use separated natural peanut butter?
That style has a different oil balance and is not the written ingredient. Choose conventional stabilized creamy peanut butter for this version.
Why is the total time long?
The estimate includes two hours chilling, three trays baked sequentially, and finished-cookie cooling. An overnight chill or additional tray-cooling pauses can extend it.
More Recipes to Try
- Thick and Chewy Peanut Butter Cookies
- Peanut Butter Cup Cookies
- Lemon Sourdough Discard Cake
- Sourdough Starter from Scratch
Sourdough Peanut Butter Cookies
Ingredients
For the Cookie Dough
- 95 grams unsalted butter (softened) Make sure the butter is softened.
- 240 grams granulated sugar For the dough; rolling sugar is separate
- 40 grams brown sugar
- 125 grams creamy peanut butter Conventional stabilized creamy peanut butter, without separated oil
- 75 grams sourdough discard Mature healthy discard; starter fed equal flour and water weights
- 1 large egg
- 1.5 teaspoons pure vanilla extract
- 185 grams all-purpose flour
- 0.5 teaspoons baking powder
- 0.5 teaspoons baking soda
- 3/4 teaspoon fine salt Add an extra small pinch only if desired
For rolling
- 2 tablespoons granulated sugar Separate from dough sugar; coat lightly
Instructions
- Beat softened butter until smooth, then cream with the measured granulated and brown sugars for about 2 minutes, scraping the bowl.
- Blend in peanut butter and discard. Mix in the egg and vanilla. Whisk flour, baking powder, baking soda, and salt separately, then add in two parts just until incorporated.
- Cover and refrigerate the dough at least 2 hours, or up to 24 hours. Keep the separate 2 tablespoons rolling sugar aside.
- Heat the oven to 375°F. Portion approximately 16 balls around 55 grams each and coat lightly with rolling sugar. Put no more than 6 on a parchment-lined metal tray, leaving spreading room.
- Bake 9 minutes. If desired, gently drop one tray corner a small distance onto the rack, then another, using oven mitts. Continue 1½–2 minutes, optionally repeat the small drop, then bake another 1–2 minutes until edges are golden and centers just set without wet dough. Total bake is approximately 12–13 minutes per tray.
- Cool 5 minutes on the tray and about 25 minutes on a rack. Repeat for the remaining two trays, keeping unbaked dough cold and letting the tray cool before reuse.
