Desserts
This sourdough discard apple pie transforms baking day scraps into a golden, flaky crust that rivals store-bought—no waste, all flavor.
The secret lies in balancing discard with butter and flour for a tender yet sturdy base, while caramelized apples and warm spices create a filling that tastes like autumn in every bite.
I developed this recipe after realizing how much sourdough discard I was tossing, and now it’s become my go-to for both zero-waste baking and showstopping desserts.
The crust starts with a simple mix of discard, cold butter, and flour, chilled just enough to prevent shrinking. Meanwhile, the filling combines tart apples with cinnamon, brown sugar, and a touch of lemon juice for brightness—all baked until bubbling and fragrant.
What makes this pie special is how the discard’s tanginess cuts through the sweetness, creating a perfect balance that keeps the crust from becoming too rich.
By the time it emerges from the oven, you’ll have a pie with a crispy, golden crust that flakes effortlessly and a filling so tender it melts with each forkful. The aroma alone will have guests asking for seconds, and the best part?
You’re using something you’d normally discard. This is the kind of recipe that turns a simple afternoon into a memorable dessert experience—without any extra effort.
Perfect for family dinners, potlucks, or a cozy night in, this pie proves that baking can be both sustainable and spectacular. Ready to put that sourdough discard to good use? Let’s get started.
Ingredients for sourdough discard apple pie
Turn your sourdough scraps into a golden, flaky crust that'll impress everyone—no waste, all flavor!
| Ingredient | Amount | Notes |
|---|---|---|
| Sourdough Discard 🍞 | 1 ½ cups | Active discard, tangy flavor |
| Unsalted Butter 🧈 | ¾ cup | Cold, cubed for flakiness |
| All-Purpose Flour 🌾 | 3 ½ cups | Plus 1 tbsp for dusting |
| Granulated Sugar 🍚 | ¾ cup | For crust and filling |
| Ice Water 💧 | ¼ cup | For crust binding |
| Apples (Granny Smith & Honeycrisp mix) 🍎 | 6 medium | Peeled, sliced 1/4-inch thick |
| Brown Sugar 🍚 | ½ cup | Packed, for caramelization |
| Ground Cinnamon 🌿 | 2 tsp | Plus extra for sprinkling |
| Lemon Juice 🍋 | 1 tbsp | Freshly squeezed |
| Salt 🧂 | ½ tsp | Fine sea salt preferred |
| Ground Nutmeg 🌿 | ¼ tsp | Freshly grated preferred |
| Cornstarch 🌾 | 1 tbsp | For thickening filling |
| Egg White 🥚 | 1 whole | For egg wash |
The sourdough discard is the star here—look for discard that's still bubbly and active (that means it's ready to work). Whole Foods and Trader Joe's often have great quality, but ask your local bakery—they usually give it away for free! The butter needs to be cold, so pull it from the fridge right before mixing. I always use European-style butter like Plugrá for extra flavor, but any good unsalted butter works. For the apples, Granny Smith adds tartness while Honeycrisp keeps things juicy—6 medium apples is perfect for a 9-inch pie, but you can use up to 8 if they're small.
No Granny Smith? Fuji or Braeburn hold up well and add sweetness. The discard too sour? Mix in 1 tbsp of plain yogurt to mellow it out. Short on butter? Coconut oil works in a pinch, but it won't be as flaky. For the spices, Penzeys has the best cinnamon and nutmeg, but the regular grocery store stuff is fine. The lemon juice is non-negotiable—it keeps the apples from browning too fast and adds that bright pop. And if you're feeling fancy, toss the sliced apples in a little vanilla extract before baking for extra depth.
This pie tastes even better the next day, so make it ahead if you can. Store the crust (unbaked) wrapped in plastic in the fridge for 2 days or freeze it for 3 months. The filling can be prepped 1 day ahead—just cover it tightly and keep it in the fridge. For serving, I like to brush the crust with a little extra egg wash and sprinkle with turbinado sugar right before baking—it gives that beautiful caramelized crust. Leftovers? Keeps for 4 days in the fridge or 2 months frozen.
Why You'll Love This Recipe
- No-Waste Magic: I swear by this trick—turning yesterday’s discard into today’s golden crust. That tangy, chewy texture? It’s the secret weapon I’ve been missing in my store-bought crusts, and it only takes one bowl to mix.
- Sweet-Tart Crunch: The sourdough’s funk plays so well with spiced apples—like a hug for your taste buds. That crispy butter-laced crust? It’s the kind of bite that makes you reach for a second slice before the first one’s even cooled.
- Weeknight Hero: No fancy rolling pins or stress here. Just toss the dough, let it rest while you prep the filling, and bake. Leftovers? They reheat like a dream—warm slices for breakfast or straight from the fridge when you’re too tired to cook.
- Budget Crust Win: Flour, sugar, and butter are pantry staples, and using discard means less food waste. For under $5, I get a crust that tastes homemade but doesn’t require a day of my life. (Yes, even on a Tuesday night.)
Step-by-step instructions for sourdough discard apple pie
Here's how to create a flaky, tangy crust and caramelized apple filling that'll make your pie the star of any gathering.
Make the Sourdough Discard Crust
In a large bowl, whisk together the 1.5 cups sourdough discard with the 0.75 cup granulated sugar until fully combined. The discard should be active and bubbly—if it's not, your pie might not rise properly. Add the 0.75 cup cold, cubed unsalted butter and cut it into the mixture using a pastry cutter or your fingers until the pieces are the size of small peas.
Next, gradually add the 3.5 cups all-purpose flour and the 0.5 tsp salt while mixing gently with a fork or wooden spoon. The dough will be shaggy at first, but that's okay. Pour in the 0.25 cup ice water and mix until the dough just comes together. It shouldn't be sticky—if it is, add a tablespoon more flour. Turn the dough onto a lightly floured surface and knead it gently just until it's smooth, about 30 seconds.
Prepare the Apple Filling
While the dough rests, peel and slice the 6 medium apples into ¼-inch thick slices. Toss them in a large bowl with the 0.5 cup packed brown sugar, 2 tsp ground cinnamon, 0.25 tsp ground nutmeg, and 1 tbsp lemon juice. The lemon juice brightens the apples and prevents browning. Mix gently but thoroughly so every slice gets coated with these flavorful ingredients.
In a small bowl, whisk together 1 tbsp cornstarch with 1 tablespoon water to make a slurry. This will help thicken the filling and prevent a watery pie. Add the slurry to the apple mixture and toss again. Let the filling sit for 15 minutes while you roll out the dough—this gives the cornstarch time to start working.
Roll and Assemble the Pie
Divide the dough into two equal parts. Roll out one piece into a 12-inch circle on a floured surface, about ⅛-inch thick. Transfer it to a 9-inch pie dish, gently pressing it into the bottom and up the sides. Trim any excess dough hanging over the edge. Roll out the second piece of dough and place it on a floured plate—this will be your top crust.
Spread the apple filling evenly into the bottom crust, mounding it slightly in the center. Brush the edges of the bottom crust with the 1 whole egg white diluted with 1 teaspoon water. This helps create a golden, flaky seal. Place the top crust over the filling, trimming any excess and crimping the edges together with your fingers or a fork to seal tightly.
Create the Classic Lattice Top
Cut the top crust into 8 equal strips, about 2 inches wide. Arrange 4 strips horizontally across the pie, leaving a ½-inch gap between each. Fold back every other strip and place a perpendicular strip underneath, then unfold. Repeat with the remaining strips, creating a classic lattice pattern. Brush the lattice with the remaining egg wash for extra shine.
Cut a few small slits in the top crust to allow steam to escape. This prevents a soggy pie. Sprinkle the lattice with a pinch of extra ground cinnamon for added flavor and visual appeal. Place the pie on a baking sheet to catch any drips.
Bake to Golden Perfection
Preheat your oven to 375°F. Place a baking sheet on the lower rack to create a steam environment, which helps the crust get crispy. Bake the pie for 45-50 minutes until the crust is deep golden brown and the filling is bubbling through the lattice. The edges should be bubbly but not burnt.
Let the pie cool for at least 2 hours before slicing—this allows the filling to set and the crust to firm up. The aroma filling your kitchen will be worth the wait. Serve warm with a scoop of vanilla ice cream or whipped cream for the ultimate dessert experience.
Pro Tips For Making Sourdough Discard Apple Pie
- Chill the Discard: Stick your sourdough discard in the fridge overnight before using it—this slows the yeast down and gives you a more controlled rise in the dough. I used to skip this and ended up with a dense, gummy crust that tasted more like sad bread than pie.
- Cut Cold Butter Fast: Freeze your butter for 20 minutes before cutting it into the flour—it’ll stay in chunks longer and create flakier layers. After burning my first crust trying to cube softened butter, I learned: cold butter = less stress, better texture.
- Skip the Overmixing: Once you add ice water to your dough, stop mixing the second everything clumps together. Overworking it turns the crust tough, and nobody wants a pie that fights back when you cut it. Two minutes max—set a timer if you’re distracted like me.
- Blind-Bake the Crust: Pop a pie weight or dried beans in the pre-baked crust for 15 minutes before adding the apples—this prevents a soggy bottom. I was skeptical until I tried it; now I swear by it, especially with juicy apples that leak like a faucet.
Dietary considerations for this dish
Gluten-Free Adaptation
Swap the all-purpose flour for a 1:1 gluten-free baking blend like Bob’s Red Mill or King Arthur Measure for Measure. Add ½ tsp xanthan gum to help bind the crust—this mimics gluten’s structure.
Chill the dough longer (1 hour) since gluten-free doughs shrink more. For extra flakiness, use cold coconut oil instead of butter.
Lower-Sugar Option
Reduce the brown sugar in the filling to ¼ cup and add 1 tsp vanilla extract for depth. Use sweetened apples like Honeycrisp to balance tartness. For the crust, cut the granulated sugar to ¼ cup—the discard’s tanginess will still shine.
Sprinkle 1 tbsp turbinado sugar on the lattice before baking for caramelization without extra sweetness.
Dairy-Free Crust
Replace the butter with ½ cup dairy-free margarine (like Miyoko’s) or coconut oil. For extra richness, mix in 2 tbsp neutral oil (like avocado oil) with the cold fat.
The crust will still be tender but slightly denser. Use dairy-free egg wash (1 tbsp aquafaba + 1 tsp water) for brushing the lattice.
Vegan Egg Wash
Skip the egg white wash entirely for a fully vegan pie. Instead, brush the lattice with 1 tbsp melted dairy-free butter or olive oil mixed with 1 tsp maple syrup for shine.
Sprinkle with turbinado sugar before baking—it’ll caramelize beautifully without animal products. The crust will still brown, though slightly less dramatically.
Nut-Free Filling
If nut allergies are a concern, use oat flour (½ cup) instead of cornstarch for thickening. Oats add subtle sweetness and bind the filling without nuts. For extra thickness, mash ½ cup cooked applesauce into the filling before baking. The texture stays firm but naturally sweetened—no added sugars needed.
Allergy-Friendly Spices
Check your cinnamon and nutmeg for cross-contamination warnings if allergies are severe. Brands like Simply Organic are certified gluten-free and processed in dedicated facilities. For nutmeg, opt for ground versions (whole nutmeg is safer but harder to measure). Always verify labels—some spice blends contain hidden allergens.
Nutrition facts
Frequently asked questions
Why does my sourdough discard crust turn out dense instead of flaky?
The most common issue is overworking the dough or using warm butter. Keep everything cold and handle the dough minimally—just until it comes together. Also, make sure your discard is active (bubbly) and not too sour. If it's overly tangy, add 1 tbsp plain yogurt to mellow the flavor. Chill the dough for at least 30 minutes before rolling to prevent shrinking.
Can I make this pie without a lattice top?
For a simpler look, use a full top crust with a few slits cut in it. Brush it with egg wash and sprinkle with cinnamon sugar before baking. Alternatively, try a crumb topping by mixing ½ cup flour, ½ cup brown sugar, and ¼ cup cold butter, then sprinkling it over the apples before adding the bottom crust.
How do I know when my sourdough discard is ready to use?
Look for active discard that's bubbly and has a pleasant, tangy aroma—not overly sour or alcoholic. It should float in water (like a proper sourdough starter). If it's too sour, mix in 1 tbsp yogurt or milk to balance it. Fresh discard from a 24-hour feed works best. Store-bought discard from bakeries is usually perfect!
Can I use frozen apples instead of fresh?
Yes, but thaw and drain them first to prevent a watery filling. Toss them with the spices and cornstarch slurry as directed. Frozen apples work best in this recipe because they're often pre-sweetened and hold their shape better. Just add 1 extra tbsp lemon juice to keep the color bright.
What's the best way to reheat leftover pie?
Slice the pie and warm it in a 350°F oven for 10-15 minutes on a baking sheet with foil underneath to catch drips. For microwave reheating, cover with a damp paper towel and heat for 20-30 seconds at 50% power. The crust stays crispier when reheated gently—never microwave uncovered!