Sourdough Granola Bars

Sourdough granola bars - a healthy, sugar-free snack

5 from 2 reviews

Fermenting the oats in this granola bar with either a sourdough starter or yogurt results in a healthy snack that doesn’t require sweetener or flour as a binder. This granola bar is a perfect for all sorts of flavour options. See the section above for 5 delicious options: blueberry almond, chocolate pecan, tropical or salty peanut.


  • 1 1/2 cups of rolled oats (quick or regular)
  • 1/2 cup sourdough starter (see notes for yogurt alternative)
  • 2 eggs (see notes for vegan flax eggs option)
  • 1/4 cup ground dates
  • 1 tsp vanilla
  • 1/2 tsp salt
  • 1 cup mixed nuts, seeds and dried fruit


  1. Mix rolled oats and the sourdough starter in a glass bowl. It will be quite dry. However, cover and leave it to soak or ferment for at least 30 minutes and up to 12 hours.
  2. Beat in the eggs, ground dates, vanilla and salt.
  3. Mix in 1 cup of added nuts, seeds, dried fruit or chocolate chips. See the section above for 5 delicious flavour options.
  4. Grease a 9″ x 9″ baking pan (or other 10 cup baking pan). Spread the granola bar mixture in the pan, and press so that it is firmly packed into the bottom of the pan.
  5. Bake at 300 F (150 C) for 50-60 min, until firm and browning around the edges.
  6. Remove from the oven and slice right away. Then allow the granola bars to cool before removing them from the pan.


  • Though the recipe is written for a sourdough starter, you could also use a gluten free sourdough starter or replace the sourdough starter with yogurt or buttermilk. It will be a bit more liquidy, but the oats will absorb the extra liquid and result in a softer granola bar.
  • The eggs in this recipe are used as a binder and are mostly necessary for gluten free granola bars. However, flax is a really great binder as well. To replace the eggs with flax, use 2 tbsp of ground flax mixed in a 1/4 cup of water. Leave it to sit and gel for 5 minutes, then stir into the granola bars.
  • Date sugar (affiliate link) is my usual sweetener of choice. It is high in fiber, vitamins and minerals. However, it is not very sweet. To make a sweeter granola bar replace the ground dates with brown sugar, rice syrup or honey.

Keywords: gluten free, vegan, sugar free, wholegrain, breakfast, dessert, healthy, travel food, soaked, fermented, yogurt, chocolate, peanut, blueberry, almond, tropical