Books&Bakes

Learn more

High-Protein Sourdough Discard Granola Bars (Low Fat + Cozy Meal Prep)

This post may contain affiliate links, which means I may earn a small commission at no extra cost to you. 🤍

There’s something so comforting about turning “scraps” into something beautiful.

If you keep a sourdough starter on your counter, you probably know the feeling—discard stacking up, too precious to waste, but not always sure what to do with it. These high-protein sourdough discard granola bars are one of my favorite solutions: soft, lightly sweet, nourishing, and perfect for busy mornings, toddler snacks, or a quiet coffee moment.

They’re everything I love in a recipe:

~ simple ingredients
~ cozy bakery-style texture
~ secretly nourishing
~ and just a little bit magical ✨


🌾 Why You’ll Love These Bars

These aren’t your typical crunchy granola bars. Think:
soft-baked, slightly chewy, oat-filled squares with a gentle tang from sourdough and a boost of protein to keep you full.

They’re:

~ 💪 High in protein
~ 🧈 Low in fat
~ 🍯 Naturally sweetened
~ 🍞 A perfect way to use sourdough discard
~ 👶 Kid-friendly & freezer-friendly

Kitchen Tools I Love for This Recipe

Some of the tools I used to make these cozy sourdough protein bars

High Protein Sourdough Discard Granola Bars
Yeilds: 8 - 10 bars 


🧺 Ingredients (Grams)

 90g rolled oats
 50g oat flour
 37g protein powder (1 scoop)
 120g sourdough discard (unfed)
 120g 0% Greek yogurt
 60g egg whites
 80g honey (or syrup)
 60g unsweetened applesauce
 5g vanilla extract
 2g cinnamon
 1.5g salt

Optional add-ins:
(I did 30g mini chocolate chips, 10g chia seeds, and 10g pumpkin seeds) 

 15–30g mini chocolate chips
 20–40g dried fruit (blueberries, apples, etc.

👩‍🍳 How to Make: 

1. Preheat the oven to 350°F (175°C) and line a square pan.

2. In a bowl, mix oats, oat flour, protein powder, cinnamon, and salt.

3. In another bowl, whisk together discard, yogurt, egg whites, honey, applesauce, and vanilla.

4. Combine everything until you get a thick, scoopable dough.


👉 If it feels too wet: add 10–20g oat flour
👉 If too dry: add a splash of yogurt or applesauce


5. Press the mixture very firmly into your pan.

6. Bake for 15–18 minutes, until set.

7. Let cool completely before slicing (this is key for clean bars!).

☕ Texture Notes

These bars are:

~ soft
~ slightly chewy
~ lightly cake-like

If you prefer firmer bars:

~ bake a few minutes longer
~ or chill before cutting

🍂 Cozy Flavor Ideas

Once you’ve made these once, it’s hard not to play around:

~ 🍎 Apple Cinnamon (extra cinnamon + diced dried apples)
~ 🍫 Double Chocolate (add cocoa powder + chocolate chips)
~  🫐 Blueberry Crumble (dried blueberries + vanilla)
~ 🍓 White Chocolate Raspberry

Storage Tips:
•  Room temperature: 3–4 days (airtight)
• Fridge: up to 1 week

•  Freezer: up to 2 months

✨ Tip: Always let bars cool completely before storing to prevent moisture buildup.

🥣 Nutrition Information (Per Bar)
(Based on 8 bars, without optional add-ins. Values are estimates and may vary slightly depending on protein powder used.)

Calories: ~140 kcal
Protein: ~10–12g
Carbohydrates: ~20g
Fat: ~2–3g
Fiber: ~2–3g
Sugar: ~8–10g

💡 These make a great balanced snack—protein to keep you full, carbs for energy, and low fat for a lighter option.

💛 A Little Note From My Kitchen

These bars were born out of that in-between moment—when you want something homemade, nourishing, and just a little cozy… but also quick, practical, and real-life friendly.

Whether you’re baking during nap time, prepping for the week, or just trying to use up that sourdough discard sitting on your counter—this recipe is here for you.

If you try these, don’t forget to save this recipe for your next sourdough baking day 🤍
And if you make a variation, I’d love to hear what you added—those are always the best versions.

Don’t forget to follow me on my socials for more cozy content!

Leave a comment