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A plate of freshly baked seedy sourdough crackers on a white countertop.
Sourdough Discard

Sourdough Discard Seed Crackers (fermented 48 hours)

Use active starter or discard in these delicious, 48-hour fermented, crunchy seed crackers made with sunflower, chia, flax, and hemp seeds.

Prep: 10 minutes
Cook: 30 minutes
Total: 48 hours 40 minutes
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Recipe Index | Ferment | Sourdough Discard

Sourdough Discard Seed Crackers (fermented 48 hours)

Use active starter or discard in these delicious, 48-hour fermented, crunchy seed crackers made with sunflower, chia, flax, and hemp seeds.

A plate of freshly baked seedy sourdough crackers on a white countertop.

Sourdough Fermented Seed Crackers

Great news, you can use active starter or discard in these seed crackers. Either way, your sourdough starter is considered “discarded” in the recipe, since you don’t need it for leavening (rising).

Sourdough discard is poured into a seed mix for mixing.
Hands using a rolling pin to flatten the sourdough starter and seed mixture.

I made these delicious crackers with some stiff starter from my fridge, but you can use any discard or active starter you have on hand. The only thing is, you can expect variations in texture and flavor depending on your starter. Discard will naturally be more sour than an active starter, but that isn’t a bad thing! As the seeds ferment in the cracker dough in the fridge, the acids and microbes in the starter really bring out some umami and almost cheesy flavors.

If you don’t know, “stiff starter” is just thicker than normal sourdough starter. It’s great for storing in the fridge for long periods. I really love the texture of seed crackers made with a thicker starter. It’s like the gluten strands in the thicker starter give the crackers a Triscuit-like texture. If you are not into that, use a thinner starter!

The dough is packed into a dough ball before rolling it flat.
Hands use a dough scraper to divide the rolled out dough into small squares.
Hands begin to pull apart the divided squares of dough.

The Best Seeds to Use

My favorite seeds to use are hemp, shelled sunflower, chia, and flaxseed. I can’t really tell you the biochemistry of what goes on when these seeds ferment (I hated that class in college, lol), but this seed combo gives the best flavor. Next time I make them, I think I’ll try some roughly chopped pumpkin seeds in place of sunflower seeds, though. If you want to experiment with other seeds, let me know how it goes in the comments!

A dry mixture of seeds including hemp, shelled sunflower, chia, and flaxseed.
The sourdough discard and dry seeds are mixed into a dough ball.

Things You May Need:

two glass weck jars one with pickles inside and the other with bubbly sourdough starter

Weck Jars

three sourdough spurtles made of wood

Teakwood Stirring Spatula for Sourdough

Handmade Mixing Bowls

Handmade Mixing Bowls

French Sourdough Starter

French Sourdough Starter

A product image of a counter top oven showing the front face

Breville Smart Oven Air Fryer Pro

Australian Sea Salt

Australian Sea Salt

The finished seedy sourdough crackers cool on parchment paper.

How to Store Seed Crackers

Once your crackers are fully baked and cooled, store them in a glass jar with an airtight lid, a silicone stasher bag, or a Tupperware. Just make sure the container doesn’t let in humidity or moisture, or the crackers will go stale.

You can also freeze the cracker dough for later. Sprinkle flour and shape into a rectangle, then tightly wrap in parchment paper and store in a zip-top bag in the freezer for up to 3 months. Then defrost, roll out, and bake.

A plate of freshly baked seedy sourdough crackers on a white countertop.
A cracker broken in half reveals the triscuit-like flaky texture.
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A plate of freshly baked seedy sourdough crackers on a white countertop.
Sourdough Discard

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Sourdough Discard Seed Crackers

Use active starter or discard in these delicious, 48-hour fermented, crunchy seed crackers made with sunflower, chia, flax, and hemp seeds.

  • Prep: 10 minutes
  • Cook: 30 minutes
  • Total Time: 48 hours 40 minutes

Ingredients

  • 1/2 cup sunflower seeds, shelled
  • 1/4 cup hemp seeds
  • 1/4 cup flaxseed
  • 2 tablespoons chia seeds
  • 2 cups sourdough starter (see notes)
  • 2 tablespoons salted butter, melted
  • 1/2 tsp salt

Instructions

  1. Mix everything together in a big mixing bowl until fully combined. It should be kind of like a sticky dough ball, but the texture depends on the thickness of your starter.
  2. Cover and let ferment in the fridge for 48 hours.
  3. After fridge fermentation, preheat the oven to 350°F.
  4. Lightly flour a piece of parchment paper sized to fit your baking pan and the top of the dough. (You may want to split the dough and work in batches. I had to use two sheet pans to fit all the crackers.
  5. Place the dough onto the floured parchment and roll it about 1/16 inch thick. (should be the thickness of a sunflower seed)
  6. Transfer the dough and parchment together onto a baking sheet.
  7. Cut the dough into about 1-inch squares; I suggest using a pizza or cracker cutter.
  8. Lightly brush with extra-virgin olive oil, then sprinkle the salt over the top of the crackers.
  9. Bake the crackers for 20 to 25 minutes until they start to crisp and brown around the edges. Midway through, rotate the baking sheets.
  10. When browned and crisp to your liking, remove the crackers from the oven and let them cool.
  11. Store crackers in an air-tight container at room temperature for about a week or two. I like to store them in a sealed glass weck jar or a silicone stasher bag.

Notes

  • You can use an active starter or discard in this recipe. Discard will give you a more sour flavor. Either way, the starter is considered “discarded” into the recipe because it’s not needed for leavening. 
  • The thickness of your starter will greatly impact texture. I recommend a thicker starter. 

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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A lot of people think vinegar kills all microbes b A lot of people think vinegar kills all microbes because shelf stable pickles do not contain microbes. But with shelf stable pickles, it’s the pasteurization/sterilization via hot water bath or pressure canning that makes shelf stable pickles free of microbes.

Hot hot hot acid in a pressurized environment does kill, well…most microbes. 

Think about “refrigerator pickle” recipes, though. They need to be stored in the refrigerator because vinegar alone doesn’t stop fermentation.

Fridge pickles are made without pasteurization/sterilization (canning) so they will wild ferment without refrigeration, and not necessarily in a good way because there’s not enough salt. 

All vinegar is made via fermentation too, and vinegar fermentation involves acetic acid bacteria, but also a ton of LAB, mainly Lactobacillus, Pediococcus, and Leuconostoc (the same genera you’d find in fermented veg.)  I linked a reference paper in my fermented mushroom recipe blog, so you all can read about the LAB involved in vinegar fermentation. 

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I will not ever wild lacto ferment just beets agai I will not ever wild lacto ferment just beets again lol. Mixing with cabbage for beet sauerkraut is the best though! 

“Lacto fermented beets” was the first ferment I tried to make after learning sauerkraut in college. My best friend Sidney came over and we used these gorgeous beets from the farmers market, with 2.5% salt, and some spices. Well, it ended up tasting like beet moonshine and it was just… not good.

But it was a conduit for learning. Those beets were my first lesson in how different sugars and growth in the rhizosphere vs the phyllosphere influences fermentation. 

Cabbage and the cabbage microbiome offer a lot to balance out beets in fermentation, and I think mixing into a sauerkraut is the only way to go for lacto fermenting beets! 

Try googlin’ “beet and red cabbage sauerkraut” and you’ll see my recipe, I’m Cultured Guru.
Squash is the secret ingredient! My Roasted Butte Squash is the secret ingredient!

My Roasted Butternut Squash Hot Sauce recipe is free on my website! I didn’t cook this one, so yes it’s still probiotic.

When lactic acid bacteria ferment the starches in winter squash, they naturally convert them into emulsifying compounds called exopolysaccharides. So when we blend our hot sauce after fermentation, there’s no watery separation in the bottle. Roasting the squash with the garlic for the recipes also adds such good flavor! 

Definitely make sure it’s fully fermented and not bubbling anymore before you blend and bottle. Otherwise, it’ll carbonate in the cute little hot sauce bottles.

#hotsauce
Myth Busting: Yes, the SCOBY IS the pellicle! Plee Myth Busting: Yes, the SCOBY IS the pellicle! Pleeeease stop saying it’s not. 😌



Watch till the end, I show you how to grow one!



This is a little tidbit from what I teach in the Kombucha lesson in our Fermented Drinks Semester online course!

I also share this recipe FOR FREE just ✨GOOGLE✨ “cultured guru SCOBY” and you’ll see my full recipe with the perfect sugar to tea ratios for growing, feeding and maintaining a kombucha SCOBY.

#kombucha
And the knife stays in the box. GOOGLE “sourdoug And the knife stays in the box. 

GOOGLE “sourdough king cake” my recipe is the first one! 👑☂️💚✨

If you’re like me and prefer from scratch, homemade everything, you’ll definitely want to try this king cake for Mardi Gras! I used organic naturally dyed sprinkles and all that jazz too. 

If you just search “sourdough king cake” on google you’ll see my recipe, it’s usually the first one. 

My main tips for making this:
✨use a very active starter or throw in some instant yeast with your starter
✨make sure the dough is actually proofed before shaping it. If it’s cold in your house it will take longer. 
✨please follow directions! You can cold ferment the dough in the fridge after it doubles in size and BEFORE filling and shaping.

🎵Song is Casanova by Rebirth Brass Band
Fermentation is a gift from the microbes of this e Fermentation is a gift from the microbes of this earth.

When we had a food business, I could never shake the feeling that fermentation is not meant to be sold to you from a fluorescently lit grocery shelf in an endless cycle of waste. Fermentation is meant to be cultivated in your home, with your hands, with intention and love in a sustainable, grateful practice of reciprocity and nourishment. 

This is the story of how we got here. 

After so many lessons learned, our small fermentation business is now value aligned, peaceful, fulfilling, and happy.  It often seems like the gut feelings (the microbes within us) guided us in the right direction. To teach. 

You can learn for free on our blog, or you can enroll in our online courses (we extended our new year sale!) Either way, with me as your teacher, you’ll learn to adopt a holistic perspective on the microbial ecosystems that influence our food, lives, and the planet.
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