These sourdough discard no bake chocolate oatmeal cookies are soft, fudgy, and deeply chocolatey with a chewy oat base and a mild tang from the sourdough discard that keeps the sweetness balanced without overpowering the rich cocoa and peanut butter flavor.
Everything comes together in one saucepan on the stovetop and drops onto parchment to set at room temperature in about 30 minutes with no oven, no chilling, and no special equipment needed.
Stir them into a batch alongside Sourdough Einkorn Oatmeal Raisin Cookies, Sourdough Animal Crackers with Freshly Milled Flour, and Sourdough Granola | Discard or Starter for a full cottage kitchen snack spread.
Why You’ll Love This Recipe
Ingredients
Variations & Add-Ins
Recipe Tips
Measure and prep everything before starting – This mixture moves quickly once the sugar syrup reaches a boil. Have the peanut butter, sourdough discard, oats, and vanilla measured and ready beside the stove before turning on the heat.
Start timing at a full rolling boil – Wait until the entire surface is actively bubbling before starting the one minute timer. Bubbling only around the edges does not count as a full rolling boil and the cookies may not set properly if timed too early.
Stir constantly while heating – Continuous stirring helps the sugar dissolve fully and prevents the cocoa from scorching on the bottom of the saucepan before the mixture reaches temperature.
Boil for the full minute – Undercooking leaves the cookies soft and sticky while overcooking makes them dry and crumbly. The full 60 seconds at a rolling boil is what gives the cookies their fudgy, chewy texture after setting.
Add mix-ins immediately off the heat – The mixture thickens quickly once removed from the burner. Stir in the peanut butter, sourdough discard, and vanilla right away so everything blends smoothly before the mixture tightens.
Choose your oats intentionally – Rolled oats give more chew and a heartier texture while quick oats create a softer, more cohesive cookie. Replacing up to half the rolled oats with quick oats tightens the texture without losing the body of the finished cookie.
Scoop while the mixture is still warm – The mixture firms as it cools so portion the cookies promptly after folding in the oats for smoother tops and more consistent shapes across the batch.Adjust for humidity if needed – On humid days the cookies may take longer to firm up at room temperature. A short chill in the refrigerator for 15 to 20 minutes can help them finish setting without affecting the texture.
Instructions
- Prepare the ingredients – Measure all ingredients and place them beside the stove before turning on the heat. The mixture moves quickly once it reaches a boil so having everything ready prevents overcooking while adding ingredients.
- Combine the base ingredients – Add the sugar, milk, cocoa powder, and salt to a medium saucepan and stir over medium heat until smooth and fully combined with no dry cocoa remaining.
- Bring to a full rolling boil – Continue stirring as the mixture heats until the entire surface is actively and steadily bubbling. Bubbling only around the edges is not a full rolling boil — wait until the center is bubbling before starting the timer.
- Boil for one full minute – Once the entire surface is at a full rolling boil, begin timing and let the mixture boil for exactly 60 seconds while stirring constantly to prevent sticking and ensure the cookies set properly after cooling.
- Remove from heat and stir in the wet ingredients – Take the pan off the burner and immediately stir in the salted butter, peanut butter, and sourdough discard until fully melted and smooth. Work quickly as the mixture begins to thicken as soon as it leaves the heat.
- Add the vanilla and oats – Stir in the vanilla extract, then fold in the rolled oats until every oat is evenly coated and the mixture looks thick and cohesive throughout.
- Scoop the cookies – Working quickly while the mixture is still warm, drop spoonfuls onto a parchment lined baking sheet using a medium cookie scoop or a tablespoon. Space them slightly apart and shape gently if needed.
- Allow to set completely – Leave the cookies at room temperature for 20 to 30 minutes until firm to the touch. On humid days place the tray in the refrigerator for 15 to 20 minutes to help them finish setting before serving or storing.
Gifting Ideas
Freezing & Storage
- Room temperature – Store fully set cookies in an airtight container in a cool, dry area for up to 2 days. Keep the container away from heat and humidity as both can cause the surface to become sticky and soft after setting.
- Refrigerator – Place cookies in a sealed container with a sheet of parchment paper between layers to prevent sticking. Refrigerate for up to 4 days. The cookies will firm up slightly when chilled but soften back to their original texture after a few minutes at room temperature.
- Freezer – Freezing is not recommended for the best texture as the cookies can become crumbly after thawing due to the sugar and oat structure. If needed, arrange fully set cookies in a single layer until frozen solid, then transfer to a freezer-safe container with parchment between layers for up to 1 month.
- Serving from cold – These cookies are best served at room temperature. If taken directly from the refrigerator, let them sit for 5 to 10 minutes before serving so the texture softens back to its original fudgy consistency.
FAQ
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More Sourdough Discard Snack Recipes from the Cottage
No-Bake Sourdough Discard Chocolate Oatmeal Cookies
Prep:15 minutes Cook:5 minutes Additional Time:30 minutes Total:50 minutes Equipment
- 1 Medium saucepan
- 1 Wooden Spoon or Spatcula
- 1 Mixing Bowl
- 1 Cookie Sheet or Pan
- 1 Roll of Parchment Paper
Ingredients
- 2 cups granulated sugar 400 grams
- ¼ cup unsalted or salted butter 57 grams
- ½ cup peanut butter 128 grams
- 3 tablespoons Dutch-process or regular cocoa powder 18 grams
- 2 pinches fine sea salt 1 gram
- 3 ½ cups rolled oats 315 grams
- 2 teaspoons vanilla extract 10 grams
- ½ cup sourdough discard 120 grams
- ½ cup whole milk 120 grams
Instructions
- Prepare the ingredients – Measure all ingredients and place them beside the stove before turning on the heat. The mixture moves quickly once it reaches a boil so having everything ready prevents overcooking while adding ingredients.
- Combine the base ingredients – Add the sugar, milk, cocoa powder, and salt to a medium saucepan and stir over medium heat until smooth and fully combined with no dry cocoa remaining.
- Bring to a full rolling boil – Continue stirring as the mixture heats until the entire surface is actively and steadily bubbling. Bubbling only around the edges is not a full rolling boil — wait until the center is bubbling before starting the timer.
- Boil for one full minute – Once the entire surface is at a full rolling boil, begin timing and let the mixture boil for exactly 60 seconds while stirring constantly to prevent sticking and ensure the cookies set properly after cooling.
- Remove from heat and stir in the wet ingredients – Take the pan off the burner and immediately stir in the salted butter, peanut butter, and sourdough discard until fully melted and smooth. Work quickly as the mixture begins to thicken as soon as it leaves the heat.
- Add the vanilla and oats – Stir in the vanilla extract, then fold in the rolled oats until every oat is evenly coated and the mixture looks thick and cohesive throughout.
- Scoop the cookies – Working quickly while the mixture is still warm, drop spoonfuls onto a parchment lined baking sheet using a medium cookie scoop or a tablespoon. Space them slightly apart and shape gently if needed.
- Allow to set completely – Leave the cookies at room temperature for 20 to 30 minutes until firm to the touch. On humid days place the tray in the refrigerator for 15 to 20 minutes to help them finish setting before serving or storing.
Notes
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Emily Rider
Home miller since 1999 with fresh-milled flour & sourdough experience. Sharing from-scratch recipes and traditional kitchen skills, rooted in the seasons and inspired by everyday cottage living and seasonal rhythms.
