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finished sourdough cranberry oatmeal cookies on a white counter top. The center cookie has a bite taken out.
Sourdough Discard

Sourdough Cranberry Oatmeal Cookies (Slice and Bake Cookies)

Perfect for using up leftover fresh cranberries, these easy slice-and-bake cranberry oatmeal cookies with sourdough starter are going to be a hit!

Prep: 15 minutes
Cook: 15 minutes
Total: 8 hours 30 minutes
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Recipe Index | Ferment | Sourdough Discard

Sourdough Cranberry Oatmeal Cookies (Slice and Bake Cookies)

Perfect for using up leftover fresh cranberries, these easy slice-and-bake cranberry oatmeal cookies with sourdough starter are going to be a hit!

finished sourdough cranberry oatmeal cookies on a white counter top. The center cookie has a bite taken out.

Soft and Chewy Cranberry Oatmeal Cookies

There’s something extra special about baking during the holiday season, and these soft and chewy cranberry oatmeal cookies are the perfect treat to add to your festive holiday spread.

Made with nourishing sourdough discard, tart fresh cranberries, hearty oats, and a touch of creamy white chocolate, these cookies combine cozy and comforting flavors. Whether you’re sharing them with loved ones or enjoying them by the fire, these cookies will indeed become a holiday favorite!

Mixing the Cranberry Oatmeal Cookies

Achieving the perfect cookies requires a strategic approach to mixing the dough. The order in which you combine the ingredients can significantly impact the texture and flavor of your cookies. Here’s a recommended order for mixing cookie dough ingredients:

  • Butter: Start by creaming room-temperature browned butter with your sugar. Creaming the butter and sugars together helps create a light and tender cookie texture.
  • Sourdough Starter: add the sourdough starter as an egg replacement, along with any additional wet ingredients, like vanilla extract, to the butter and sugar. The starter adds moisture and a unique tangy flavor to the cookies.
  • Dry Ingredients: In a separate bowl, combine the dry ingredients: flour, baking soda, baking powder, and salt. Gradually add this mixture to the wet ingredients, stirring until just combined. Overmixing can result in tough cookies, so be careful not to overwork the dough.
  • Cranberry and white chocolate mix-ins: Gently fold in the white chocolate and fresh cranberries. These additions give your cookies their distinct flavor.
  • Chill the Dough: Roll the dough up in parchment paper, then refrigerate it overnight in the fridge or for a few hours in the freezer. Chilling the dough allows the flavors to meld and the cookies to hold shape during the baking.

Chilling the cranberry oatmeal cookie dough

After you mix the cookie dough, you need to form and wrap the dough in parchment paper for chilling. The dough must be firm and chilled solid before you can slice it.

Chilling the dough allows the butter to solidify and fully absorb into the flour. If you try to skip the chill step, the cookies will spread and melt in the oven, and no one wants that.

How to coat and slice cranberry oatmeal cookies

My favorite aspect of slice-and-bake cranberry oatmeal cookies is the crust. After chilling, the logs can be rolled in crunchy toppings like raw sugar, natural sprinkles, or nuts, adding texture and flavor.

To coat the cookie dough log, spread the toppings evenly on a sheet pan, then roll and press the log into them. If the chilled log doesn’t stick well, I alternate between rolling and pressing the coating with my hands.

If the coating isn’t adhering, you can brush the cookie dough logs with an egg wash made of 1 egg white and 1 tablespoon of water to help it stick better.

The best technique to slice the cookie dough

These cookies are filled with chunky bits, making them visually appealing and delicious, but slicing can be tricky.

Use a large, extremely sharp knife and cut quickly, pressing down firmly without sawing back and forth.

Can the cookie dough ferment in the fridge overnight?

For best results, chill the dough overnight in the fridge. This allows for a long fridge ferment, making the cookies easier to digest. The dough can be kept in the fridge for up to 2 days before slicing and baking.

Can I freeze the dough?

Yes! You can freeze either the logs or the sliced cookie. If freezing, place the logs rolled in parchment paper in an airtight container.

More Sourdough Cookie Recipes to Try

  • Sourdough Miso Chocolate Chip Cookies with Brown Butter
  • Lemon Blueberry Cookies (Blueberry Muffin Cookies)
  • Sourdough Chocolate Chip Cookies with Pumpkin and Pecans
finished sourdough cranberry oatmeal cookies on a white counter top. The center cookie has a bite taken out.
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finished sourdough cranberry oatmeal cookies on a white counter top. The center cookie has a bite taken out.
Sourdough Discard

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Sourdough Cranberry Oatmeal Cookies (Slice and Bake Cookies)

Perfect for using up leftover fresh cranberries from the holidays, these easy slice-and-bake cranberry oatmeal cookies with sourdough starter are going to be a hit!

  • Prep: 15 minutes
  • Cook: 15 minutes
  • Total Time: 8 hours 30 minutes

Ingredients

  • 170 g all-purpose flour
  • 50 grams rolled oats
  • 1/4 tsp salt
  • 115 g salted butter*
  • 150 g sugar
  • 100 g thick sourdough starter*
  • 1 tsp vanilla extract
  • 3/4 cup minced fresh cranberries (or craisins)
  • 1/2 cup chopped white chocolate (or chips)
  • sprinkles (optional, for coating)

Instructions

  1. If you’d like to make these soft scoop-and-bake cookies instead, you can! See notes!
  2. Brown the butter in a small saucepan until bubbly, and dark golden. Stir it continuously, careful to not burn it.
  3. Remove from heat and allow the butter to cool completely to room temperature.
  4. In a separate bowl, combine the dry ingredients (flour, oats, salt).
  5. Once the butter has cooled completely but is still liquid, to a large bowl add the brown butter, sugar, vanilla extract, and sourdough starter. Combine with a whisk or hand mixer until even.
  6. Fold the combined dry ingredients into the wet ingredients. Stir until well combined.
  7. Add your chocolate and cranberries.
  8. Form the dough into a long shape and wrap it tightly in parchment paper. Refrigerate overnight.
  9. After refrigerating, preheat the oven to 350°
  10. (Optional) sprinkle some sugar and sprinkles onto a sheet pan. Unwrap the cookie dough and roll the log in the toppings.
  11. Line a cookie sheet with parchment paper. Slice the cookie dough into half inch thick slices.
  12. Place the cookie dough slices about two to three inches apart on the lined cookie sheet.
  13. Bake for 15-18 minutes or until the edges are a very pale golden brown and the tops have turned matte.
  14. Let them sit on the cookie sheet until they are completely cool.

Notes

  • You can use discard from the fridge or active starter. Either way it is “discarded” into this recipe since it is not used for rise. I keep a thick starter, so a thin watery starter will give you a different texture in these cookies.
  • if you do not like a cookie with a balanced salty-sweet flavor, use unsalted butter or reduce the added salt.
  • To make these scoop-and-bake instead of slice-and-bake: add 1/4 tsp baking powder and 1/4 tsp baking soda to the dry ingredients. Refrigerate the dough in a covered bowl, then scoop with a cookie scoop and bake at 350°F for 15 minutes. 

Did you make this recipe?

Please leave a 5-star review below if you loved it! Tag @cultured.guru on Instagram

 

Nutrition information is auto-calculated and estimated as close as possible. We are not responsible for any errors. We have tested the recipe for accuracy, but your results may vary.

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Kaitlynn Fenley Author, Educator, Food Microbiologist
Kaitlynn is a food microbiologist and fermentation expert teaching people how to ferment foods and drinks at home.
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  1. Anonymous
    12|22|2024

    What is the oven temperature?

    Reply
    1. Kaitlynn Fenley
      12|22|2024

      350 F (listed in direction step 8)

      Reply
  2. Kacie
    12|14|2025

    There is no brown sugar in the ingredients list but in the directions it says to add brown sugar and granulated sugar. How much brown sugar do we need?

    Reply
    1. Kaitlynn Fenley
      12|15|2025

      I’m not seeing “brown sugar” anywhere in my directions. In step 5, it says “brown butter, sugar”

      Reply

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@cultured.guru

My favorite topic I teach in our online course is My favorite topic I teach in our online course is called Fermentation Variables. The whole lesson is centered around the fact that there are six main variables that influence the outcome of fermentation.

Here they are, in no particular order:

Sugar
Salt
Oxygen
Acidity
Temperature
Time

Temperature and time depend on each other most closely. 

that means, for all of our foods and drinks that ferment at room temp, things slow way down in the winter cold. 

The fermentation timeline is simply longer when it’s colder (and faster when it’s hotter). The microbes, kind of like us, make things happen slowly in the cold winter. 

I think this is yet another sign from nature that we’re supposed to rest and be gentle and gracious with deadlines, work, and not rush things this time of year. 

Let it be slow, it’ll still be great, it just takes a little more patience and time. 

If you’re looking to start fermentation as an analog hobby in the new year, our courses are 40% off right now! You can use code NEWYEARS at checkout. (Yes, you learn online, but it’s delicious, long form content + the skills are life long). What you learn empowers you to get off the computer/phone and go ferment some delicious foods and drinks. 

Touching cabbage and dough is just as good as “touching grass” lol 

Let me know if you have questions about our courses or just fermentation in general in the comments!

#fermentation
Yes cooking kills the microbes, but idc. I mean, I Yes cooking kills the microbes, but idc. I mean, I care, but in a “thank you for your service microbes” kinda way. 🫡

Cider braised pork and sauerkraut is a perfect choice for New Year’s or any winter meal! I lovvveee pairing it with butternut squash polenta bc it’s full of vitamin C for cold and flu szn. 

Eating pork and sauerkraut on New Year’s Day is a tradition. And I really do think it brings good luck and prosperity.

Get the recipe on our blog, linked in my profile and in story highlights! 

I’m really looking forward to creating more recipes like this in the new year, to show you all the joys of incorporating ferments into meals and recipes 😌✨ stay tuned! 

#newyear #sauerkraut #fermentation
One Christmas I gifted everyone in my family the N One Christmas I gifted everyone in my family the New York style sourdough bagels and they were thrilled. (The bagels we’re actually way under proofed, but I still gifted them and everyone loved them lol)

You can get the full recipe on my blog! And these can be made with discard and instant yeast or with just active starter.

 All the details are in the 5-star rated recipe on my website. 

#bagels #sourdough
This cookie dough is long-fermented overnight in t This cookie dough is long-fermented overnight in the fridge for the softest, most flavorful, melt-in your mouth sourdough gingerbread cookies.

For Christmas 2025, I tried something new with these cookies. I created a gingerbread sourdough starter to use in this recipe! I made it by feeding some of my established starter a mix that includes molasses and gingerbread spices. I just added the instructions for the gingerbread starter in the notes of my cookie recipe.

Get the full recipe and directions on my website! https://cultured.guru 

You can use the recipe index to see all my Christmas season recipes!

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My gingerbread sourdough starter recipe 🎄✨ Like a My gingerbread sourdough starter recipe 🎄✨

Like and save for some fun Christmas sourdough baking! 

I made this up a few days ago to use in my soft sourdough gingerbread cookies. (cookie recipe is in my recipe index on my website!)

#sourdough #gingerbread
Christmas gift feta cheese🧀🎄✨ Part two of my four Christmas gift feta cheese🧀🎄✨

Part two of my four part series on homemade fermented foods to gift this holiday season! This one takes about five days total to prepare, so start now if you plan to gift this one on Christmas. 

GOOGLE “cultured guru feta” to get my feta recipe any time! You can also use the recipe index linked in my bio! 

#fermentation
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