sourdough oatmeal cream pies

Prep Time: 45 minutes (active) + 3-4 hours (inactive rising)
Cook Time: 12-15 minutes per batch
Total Time: Approximately 5 hours
Intensity: Moderate (Requires some planning for rising, but basic techniques)

Description

Take a nostalgic trip back to your childhood lunchbox, but with a sophisticated, tangy twist. These aren’t your average packaged treats. Imagine two soft, chewy, and hearty oatmeal cookies, perfectly spiced with cinnamon and nutmeg, their flavor deepened by the subtle complexity of sourdough discard. Sandwiched between them is a luscious, fluffy, and not-too-sweet vanilla mascarpone cream filling. The slight tang of the sourdough and the richness of the filling create an unforgettable balance that will have everyone asking for the recipe. This is the perfect project for a weekend when you have a little time and a cup of unfed sourdough starter to use up.

Why You’ll Love This Recipe

• Uses Sourdough Discard: A delicious way to reduce kitchen waste and add incredible depth of flavor.

• Perfect Texture: These cookies are marvelously soft and chewy, just like the classic version.

• Elevated Flavor: The sourdough tang and warm spices elevate this treat from simple to spectacular.

• Make-Ahead Friendly: The cookie dough can be made a day in advance, and the assembled pies freeze beautifully.

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Ingredients

For the Sourdough Oatmeal Cookies

• 1 cup (227g) unsalted butter, softened to room temperature

• 1 cup (200g) packed light brown sugar

• 1/2 cup (100g) granulated sugar

• 1 large egg, at room temperature

• 1 teaspoon vanilla extract

• 1/2 cup (120g) sourdough starter discard (unfed, straight from the fridge is perfect)

• 1 and 1/2 cups (188g) all-purpose flour

• 1 teaspoon baking soda

• 1 teaspoon ground cinnamon

• 1/2 teaspoon ground nutmeg

• 1/2 teaspoon salt

• 3 cups (270g) old-fashioned rolled oats

For the Vanilla Mascarpone Filling

• 8 oz (226g) mascarpone cheese, chilled

• 1/2 cup (113g) unsalted butter, softened to room temperature

• 3 cups (360g) powdered sugar

• 1 and 1/2 teaspoons vanilla extract

• 1-2 tablespoons milk or heavy cream (if needed for consistency)

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Instructions

Part 1: Make the Cookie Dough (Active Time: 20 minutes)

1. Cream Butter and Sugars: In a large bowl using a hand mixer or a stand mixer fitted with the paddle attachment, beat the softened butter, brown sugar, and granulated sugar together on medium speed until light and fluffy (about 2-3 minutes). Scrape down the sides and bottom of the bowl as needed.

2. Add Wet Ingredients: Beat in the egg and vanilla extract on medium speed until well combined. Add the sourdough starter discard and mix on low speed until just incorporated. The mixture might look slightly curdled, which is perfectly normal.

3. Combine Dry Ingredients: In a separate medium bowl, whisk together the all-purpose flour, baking soda, cinnamon, nutmeg, and salt.

4. Incorporate Dry into Wet: Gradually add the dry ingredients to the wet ingredients, mixing on low speed until just combined. Be careful not to overmix.

5. Add the Oats: Using a spatula or wooden spoon, gently fold the rolled oats into the cookie dough until they are evenly distributed. The dough will be quite stiff and thick.

6. Chill the Dough: Cover the bowl tightly with plastic wrap and refrigerate for at least 1 hour, or up to 24 hours. Chilling is crucial; it prevents the cookies from spreading too much and allows the flavors to meld and the sourdough tang to develop.

Part 2: Bake the Cookies (Active Time: 15 minutes per batch)

1. Preheat & Prepare: When you’re ready to bake, preheat your oven to 350°F (175°C). Line two large baking sheets with parchment paper or silicone baking mats.

2. Portion the Dough: Remove the chilled dough from the refrigerator. Using a 1.5-tablespoon cookie scoop (or a heaping tablespoon), scoop level portions of dough and roll them into smooth balls. Place them on the prepared baking sheets, leaving about 2 inches of space between each for spreading.

3. Bake: Bake for 12-15 minutes, or until the edges are lightly golden brown and the tops look set. The centers will still appear soft.

4. Cool: Let the cookies cool on the baking sheet for 5-10 minutes. This allows them to firm up. Then, carefully transfer them to a wire rack to cool completely. The cookies must be 100% cool before you add the filling, or the filling will melt.

Part 3: Make the Filling (Active Time: 10 minutes)

1. Beat Mascarpone and Butter: While the cookies cool, make the filling. In a medium bowl, beat the mascarpone cheese and softened butter together with a hand mixer or in a stand mixer with the paddle attachment until smooth and creamy.

2. Add Sugar and Vanilla: With the mixer on low speed, gradually add the powdered sugar, one cup at a time, mixing until fully incorporated. Add the vanilla extract.

3. Whip Until Fluffy: Increase the speed to medium-high and beat the filling for 2-3 minutes, until it becomes light, fluffy, and pale in color. If the filling seems too thick to pipe or spread, add a tablespoon of milk or heavy cream and beat again until it reaches your desired consistency.

Part 4: Assemble the Cream Pies (Active Time: 15 minutes)

1. Pair Up Cookies: Find similarly sized cookies and turn them over so the flat bottoms are facing up.

2. Add the Filling: Transfer the filling to a piping bag fitted with a large round tip. (You can also simply use a zip-top bag with the corner snipped off, or use a knife to spread the filling.) Pipe or spread a generous dollop (about 1.5 tablespoons) of filling onto the flat side of one cookie.

3. Make a Sandwich: Gently press the flat side of another cookie onto the filling, squeezing just until the filling spreads to the edges. Be careful not to press too hard or the cookies may break.

4. Chill to Set: For the best texture, place the assembled cream pies on a tray or plate and refrigerate for at least 30 minutes before serving. This helps the filling firm up and makes the pies easier to handle.

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Recipe Notes & Tips

• Room Temperature Ingredients: For the cookie dough, ensure your butter and egg are at room temperature for a smooth, emulsified batter.

• Don’t Overbake: For soft, chewy cookies (essential for a good cream pie!), pull them out of the oven when the edges are just set and golden. They will continue to bake slightly on the hot pan.

• Storing: Store assembled cream pies in an airtight container in the refrigerator for up to 5 days. The cookies will soften slightly over time, becoming even more reminiscent of the classic treat. Let them sit at room temperature for 10-15 minutes before serving for the best flavor and texture.

• Freezing: You can freeze the unassembled baked cookies for up to 3 months. You can also freeze the assembled cream pies in a single layer in an airtight container for up to 3 months. Thaw overnight in the refrigerator.

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Nutrition Information

*Nutrition information is an estimate and is provided for informational purposes only. It is not a substitute for professional dietary advice. Values are based on one cream pie (using 1/15th of the recipe).*