Oatmeal Cream Pies with Soft Cookie Sandwiches

The moment you bite into one of these oatmeal cream pies, you get the comforting chew of a just-baked oatmeal cookie paired with a silky vanilla filling that melts on your tongue. The hint of cinnamon and nutmeg in the cookie layers plays off the creamy sweetness in the center, giving every sandwich the familiar aroma and texture of classic lunchbox treats, soft, thick, and never crumbly.

For my oatmeal cream pies, I rely on a combination of finely milled quick oats and all-purpose flour to keep the cookies tender and even. Creamed butter and brown sugar create a plush, pliable crumb, while an egg yolk ensures moisture. Each cookie is portioned for a perfect match-up, so your sandwiches stack evenly and look bakery-worthy. The filling is light but stable, whipped with marshmallow fluff and real vanilla for nostalgia that doesn't ooze out. Here are the precise steps and cues to get that iconic softness and easy assembly.

What Makes these Cookies Deliciously Ridiculous

• Quick oats provide chew and spread control so the cookies stay thick and sandwich-ready.
• Creamed butter and brown sugar lock in moisture for a soft, non-crunchy texture.
• Chilling the dough before scooping prevents excess spread in the oven, ensuring even thickness.
• Marshmallow creme in the filling gives extra volume and lightness without weeping or toughening.
• Matching cookie size with a portion scoop ensures perfect sandwich pairs and a clean finished look.

Ingredient Notes for Oatmeal Cream Pies with Soft Cookie Sandwiches

• Quick oats: Chopped or quick oats hydrate quickly and provide chew, essential for classic texture. Rolled oats yield a rougher, less unified crumb.
• All-purpose flour: Provides structure while keeping the cookies tender. Measure carefully to avoid denseness.
• Brown sugar: The source of deep flavor and soft texture. Light brown sugar is ideal, but dark works for extra molasses notes.
• Unsalted butter: Room temperature butter ensures full aeration when creamed. Salted will oversalt the dough.
• Cinnamon and nutmeg: These spices create the signature oatmeal pie aroma. Grate your nutmeg for extra punch.
• Egg plus yolk: Whole egg for binding, extra yolk for chew and moisture in every bite.
• Marshmallow creme: Swirled into the filling for that stable but fluffy cream layer. Resist substituting plain marshmallows.
• Powdered sugar: Sweetens and stabilizes the cream so it pipes and sets neatly.
• Vanilla extract: Adds deep flavor to both cookie and filling, choose pure for the best aroma.
• Heavy cream: Softens and loosens the filling so it spreads thickly but not runny.

Expert Baking Tips

• For perfectly round cookies, gently press the dough balls with damp fingertips before baking, this encourages even spread and smoother sandwich tops.
• If your kitchen is warm, briefly chill assembled sandwiches so the cream sets before stacking or boxing.
• Always cool cookies fully before filling or the cream will melt and become runny.
• Use a small offset spatula to clean up any filling that escapes during sandwiching.
• Sift powdered sugar for the filling to keep the cream fluffy and lump-free when whipped.

Ingredients for Oatmeal Cream Pies

• 170 g unsalted butter (softened, room temperature)
• 200 g light brown sugar (packed)
• 40 g granulated sugar
• 1 large egg (room temperature)
• 1 large egg yolk (room temperature)
• 1 tbsp molasses (not blackstrap)
• 1 tsp vanilla extract
• 150 g all-purpose flour (sifted)
• 1/2 tsp baking soda
• 1/2 tsp fine sea salt
• 1 tsp ground cinnamon
• 1/4 tsp freshly grated nutmeg
• 145 g quick-cooking oats
• 170 g marshmallow creme (such as Fluff)
• 60 g unsalted butter (room temperature, for filling)
• 160 g powdered sugar (sifted, for filling)
• 2 tbsp heavy cream (plus more as needed, for filling)
• 1 tsp vanilla extract (for filling)

How to Make Oatmeal Cream Pies

• STEP 1). Cream butter and sugars for the cookies. In the bowl of a stand mixer fitted with the paddle attachment, cream the softened butter, brown sugar, and granulated sugar at medium speed for 3-4 minutes, scraping the bowl once. The mixture should visibly lighten in color and appear fluffy, which is key for even rise and a soft bite.
• STEP 2). Mix in egg, yolk, vanilla, and molasses. Add the whole egg, extra yolk, vanilla extract, and molasses to the creamed butter. Beat at medium speed until fully blended and glossy, about 1 minute. Stop to scrape the sides and bottom of the bowl to catch any butter pockets.
• STEP 3). Combine dry ingredients and blend into dough. In a separate bowl, whisk together the flour, baking soda, salt, cinnamon, nutmeg, and quick oats. With the mixer on low speed, slowly add the dry ingredients, mixing just until no dry streaks remain. Stop as soon as the dough comes together, overmixing will toughen the cookies.
• STEP 4). Chill the dough. Transfer the cookie dough to a bowl, press plastic wrap directly onto its surface, and chill for at least 30 minutes (or up to 12 hours). Chilling firms up the dough, guarantees a thicker cookie, and prevents excess spread in the oven.
• STEP 5). Portion and bake the cookies. Preheat the oven to 350°F (175°C) and line two sheet pans with parchment. Use a 1.5-tbsp scoop to portion dough into 32 even balls. Arrange on the prepared pans with generous spacing. Bake one sheet at a time for 9-11 minutes until the edges look set but centers are slightly underdone, do not overbake for best softness.
• STEP 6). Cool the cookies completely. Let the cookies cool on the pans for 5 minutes to finish setting, then transfer to a wire rack. Cool completely before filling, warm cookies will melt the filling. Your cookies should feel soft but sturdy enough to handle.
• STEP 7). Make the marshmallow cream filling. Beat the room temperature butter with a hand mixer on medium until smooth and creamy, about 1 minute. Add the marshmallow creme, powdered sugar, heavy cream, and vanilla. Continue beating for 2-3 minutes until fluffy but thick. If needed, add a touch more cream so the texture spreads but holds shape.
• STEP 8). Assemble oatmeal cream pies. Pair up cookies by size and flip half upside down. Using a piping bag or offset spatula, spread about 2 tablespoons of filling onto the flat side of each bottom cookie, stopping short of the edge. Gently press a second cookie on top to sandwich, then twist lightly to distribute the filling to the edge without squeezing it out. Let set at room temperature 20 minutes before serving.

Storage and Freezing

• Room temperature: Store assembled oatmeal cream pies in a single layer or with parchment between stacks in an airtight container up to 2 days.
• Refrigeration: Store tightly covered for up to 5 days. Let come to room temperature before eating for softest results.
• Freezing cookies only: Freeze unfilled cookies, separated by parchment, in a freezer-safe container up to 2 months.
• Thaw at room temperature before filling and assembling; do not freeze assembled pies as the filling softens and weeps.

Frequently Asked Questions

More Ridiculously Delicious Cookies

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• Small Batch Chocolate Chip Cookies with Chewy Centers and Crisp Edges
• Raspberry Jam Sandwich Cookies with Buttery Layers
• Soft and Chewy Peanut Butter Cookies with Crisp Edges
• Thick Brown Butter Chocolate Chunk Cookies with Chewy Centers

Oatmeal Cream Pies with Soft Cookie Sandwiches

Soft, spiced oatmeal cookies sandwich a fluffy vanilla cream filling for these classic oatmeal cream pies. Each bite delivers the chewy, nostalgic texture with a creamy center and just the right amount of sweetness. Perfect for making in advance and sharing, these sandwiches stay soft without getting soggy.

Print Recipe Pin Recipe

Prep Time 35 minutes mins

Cook Time 22 minutes mins

Cooling 30 minutes mins

Total Time 1 hour hr 27 minutes mins

Servings: 16 sandwiches

Course: Dessert

Cuisine: American

Calories: 344

Ingredients Equipment Method Notes

Ingredients

  

• 170 g unsalted butter softened, room temperature
• 200 g light brown sugar packed
• 40 g granulated sugar
• 1 large egg room temperature
• 1 large egg yolk room temperature
• 1 tbsp molasses not blackstrap
• 1 tsp vanilla extract
• 150 g all-purpose flour sifted
• 1/2 tsp baking soda
• 1/2 tsp fine sea salt
• 1 tsp ground cinnamon
• 1/4 tsp freshly grated nutmeg
• 145 g quick-cooking oats
• 170 g marshmallow creme such as Fluff
• 60 g unsalted butter room temperature, for filling
• 160 g powdered sugar sifted, for filling
• 2 tbsp heavy cream plus more as needed, for filling
• 1 tsp vanilla extract for filling

Equipment

• Stand mixer or electric hand mixer
• mixing bowls
• Rubber spatula
• Half sheet pans
• Parchment paper
• Portion scoop (1.5 tbsp/medium)
• Wire rack
• Offset spatula
• Piping bag or zip-top bag (optional) for filling

Method

 

1. In the bowl of a stand mixer fitted with the paddle attachment, cream the softened butter, brown sugar, and granulated sugar at medium speed for 3-4 minutes, scraping the bowl once. The mixture should visibly lighten in color and appear fluffy, which is key for even rise and a soft bite.
2. Add the whole egg, extra yolk, vanilla extract, and molasses to the creamed butter. Beat at medium speed until fully blended and glossy, about 1 minute. Stop to scrape the sides and bottom of the bowl to catch any butter pockets.
3. In a separate bowl, whisk together the flour, baking soda, salt, cinnamon, nutmeg, and quick oats. With the mixer on low speed, slowly add the dry ingredients, mixing just until no dry streaks remain. Stop as soon as the dough comes together, overmixing will toughen the cookies.
4. Transfer the cookie dough to a bowl, press plastic wrap directly onto its surface, and chill for at least 30 minutes (or up to 12 hours). Chilling firms up the dough, guarantees a thicker cookie, and prevents excess spread in the oven.
5. Preheat the oven to 350°F (175°C) and line two sheet pans with parchment. Use a 1.5-tbsp scoop to portion dough into 32 even balls. Arrange on the prepared pans with generous spacing. Bake one sheet at a time for 9-11 minutes until the edges look set but centers are slightly underdone, do not overbake for best softness.
6. Let the cookies cool on the pans for 5 minutes to finish setting, then transfer to a wire rack. Cool completely before filling, warm cookies will melt the filling. Your cookies should feel soft but sturdy enough to handle.
7. Beat the room temperature butter with a hand mixer on medium until smooth and creamy, about 1 minute. Add the marshmallow creme, powdered sugar, heavy cream, and vanilla. Continue beating for 2-3 minutes until fluffy but thick. If needed, add a touch more cream so the texture spreads but holds shape.
8. Pair up cookies by size and flip half upside down. Using a piping bag or offset spatula, spread about 2 tablespoons of filling onto the flat side of each bottom cookie, stopping short of the edge. Gently press a second cookie on top to sandwich, then twist lightly to distribute the filling to the edge without squeezing it out. Let set at room temperature 20 minutes before serving.

Notes

• For perfectly round cookies, gently press the dough balls with damp fingertips before baking, this encourages even spread and smoother sandwich tops.
• If your kitchen is warm, briefly chill assembled sandwiches so the cream sets before stacking or boxing.
• Always cool cookies fully before filling or the cream will melt and become runny.
• Use a small offset spatula to clean up any filling that escapes during sandwiching.
• Sift powdered sugar for the filling to keep the cream fluffy and lump-free when whipped.