Sourdough Discard Oatmeal Pies
Soft Oatmeal Cookies with a Creamy Filling (Bakery-Style Classic Made Better with Sourdough Discard)
Sourdough Discard Oatmeal Pies are a homemade version of the nostalgic oatmeal cream pies many people grew up eating—soft, chewy oatmeal cookies sandwiched around a sweet, fluffy cream filling. The twist here is the addition of sourdough discard, which enhances the flavor, adds subtle tang, and keeps the cookies extra soft and moist.
These cookie sandwiches are rich, comforting, and perfect for dessert boxes, lunchbox treats, or afternoon snacks. The oatmeal cookies have warm cinnamon flavor and a chewy texture, while the cream filling is smooth, sweet, and lightly vanilla-flavored. Together, they create a bakery-style treat that tastes even better than store-bought versions.
This recipe is also a great way to use sourdough discard instead of wasting it. The discard doesn’t make the cookies taste sour—instead, it deepens the flavor and improves the texture, giving you softer cookies that stay fresh longer.
Why You’ll Love These Oatmeal Pies
Soft and Chewy Texture
The cookies stay tender with slightly crisp edges.
Creamy Sweet Filling
A smooth vanilla cream balances the spiced oatmeal cookies.
Perfect Use for Sourdough Discard
A delicious way to reduce waste from your starter.
Better Than Store-Bought
Fresh, homemade flavor with simple ingredients.
Great for Sharing
Perfect for parties, bake sales, and lunchboxes.
Ingredients
For the Oatmeal Cookies
- ½ cup sourdough discard (unfed starter)
- ½ cup unsalted butter, softened
- ¾ cup brown sugar
- ¼ cup granulated sugar
- 1 large egg
- 1 teaspoon vanilla extract
- 1 cup all-purpose flour
- 1½ cups rolled oats
- ½ teaspoon baking soda
- ½ teaspoon baking powder
- ½ teaspoon salt
- 1 teaspoon cinnamon
Optional:
- ¼ teaspoon nutmeg
- ½ cup raisins or chocolate chips
For the Cream Filling
- ½ cup unsalted butter, softened
- 1½ cups powdered sugar
- 1 teaspoon vanilla extract
- 1–2 tablespoons milk or cream
- Pinch of salt
Equipment Needed
- Mixing bowls
- Electric mixer or whisk
- Baking sheets
- Parchment paper
- Cookie scoop
- Spatula
Step-by-Step Instructions
Step 1: Preheat the Oven
Preheat your oven to 350°F (175°C).
Line baking sheets with parchment paper to prevent sticking.
Step 2: Cream Butter and Sugars
In a large bowl, beat together:
- Softened butter
- Brown sugar
- Granulated sugar
Mix until light and fluffy, about 2–3 minutes.
This step helps create soft, tender cookies.
Step 3: Add Wet Ingredients
Add:
- Egg
- Vanilla extract
- Sourdough discard
Mix until smooth and fully combined.
The batter may look slightly thick but should be creamy.
Step 4: Combine Dry Ingredients
In a separate bowl, whisk together:
- Flour
- Rolled oats
- Baking soda
- Baking powder
- Salt
- Cinnamon
- Nutmeg (optional)
Gradually add dry ingredients to the wet mixture, stirring until a soft dough forms.
Do not overmix.
Step 5: Shape the Cookies
Using a cookie scoop or spoon, portion dough into small balls (about 1½ tablespoons each).
Place them on the baking sheet, leaving space between each cookie.
Slightly flatten each dough ball with your hand or spoon.
Step 6: Bake the Cookies
Bake at:
Temperature: 350°F (175°C)
Time: 10–12 minutes
The cookies are ready when:
- Edges are lightly golden
- Centers look soft but set
- They feel slightly underbaked (they will firm up as they cool)
Step 7: Cool Completely
Let cookies cool on the tray for 5 minutes, then transfer to a wire rack.
They must be completely cool before adding filling.
Make the Cream Filling
In a bowl, beat together:
- Softened butter
- Powdered sugar
- Vanilla extract
- Pinch of salt
Add milk slowly until the filling becomes smooth, fluffy, and spreadable.
The texture should be thick but soft.
Assemble the Oatmeal Pies
Take one cooled cookie and spread a generous layer of cream filling on the flat side.
Top with another cookie to form a sandwich.
Gently press together until filling spreads to the edges.
Repeat with remaining cookies.
Tips for Perfect Oatmeal Pies
Don’t overbake cookies
Slightly soft cookies make the best sandwich texture.
Use room temperature butter
This ensures smooth mixing and fluffy filling.
Chill filling if too soft
If the cream is runny, refrigerate for 10–15 minutes.
Flatten cookies evenly
This helps create uniform sandwich shapes.
Let cookies rest
After assembling, let them sit for 30 minutes so flavors blend.
Variations
Chocolate Oatmeal Pies
Add ¼ cup cocoa powder to cookie dough or use chocolate filling.
Raisin Oatmeal Pies
Add raisins for a classic oatmeal cookie flavor.
Peanut Butter Filling
Replace butter cream filling with peanut butter buttercream.
Cinnamon Maple Version
Add maple syrup to filling for warm flavor.
Storage Instructions
Room Temperature
Store in an airtight container for 2–3 days.
Refrigerator
Keep for up to 1 week for longer freshness.
Freezer
Freeze assembled pies for up to 2 months.
Let thaw at room temperature before serving.
Nutritional Information
(Per oatmeal pie – approximate)
- Calories: 280
- Carbohydrates: 38 g
- Protein: 4 g
- Fat: 13 g
- Saturated Fat: 7 g
- Sugar: 24 g
- Fiber: 2 g
- Sodium: 150 mg
Serving Ideas
Sourdough Discard Oatmeal Pies are perfect for:
- Afternoon tea or coffee
- Lunchbox treats
- Dessert platters
- Holiday cookie trays
- Bake sales
They also taste amazing slightly chilled or at room temperature with milk.
Why Sourdough Discard Works in These Cookies
Sourdough discard adds mild acidity, which enhances the sweetness of the filling and deepens the flavor of the oats and cinnamon. It also helps retain moisture, making the cookies softer for longer.
It does not make the cookies taste sour—instead, it creates a balanced, bakery-style depth that improves the overall texture and flavor.
Final Thoughts
Sourdough Discard Oatmeal Pies are a comforting, nostalgic treat with a homemade upgrade. Soft oatmeal cookies, creamy vanilla filling, and a subtle sourdough twist make them unforgettable.
They are easy to prepare, fun to assemble, and perfect for sharing. Once you try them, they’ll likely become a regular part of your sourdough discard baking routine.
