Name: Old Fashioned Oatmeal Cream Pie Cookies Recipe
Prep time: 15 min
Cook time: 12 min
Total time: 27 min
Cuisine: American
Ingredients: 1 cup unsalted butter, cold and cubed (226g); ½ teaspoon kosher salt; 1 cup dark brown sugar, firmly packed (200g); 2 teaspoons pure vanilla extract; 2 large eggs; 1 teaspoon baking soda; 1 teaspoon ground cinnamon; 1 ½ cups all-purpose flour (188g); 2 cups quick oats (212g); ½ cup unsalted butter, room temperature (113g); Pinch of kosher salt; 1 cup confectioners’ sugar (120g); 1 teaspoon vanilla extract; 7 ounces marshmallow fluff (198g)

Jump to Recipe· 3.8 from 160 reviews

If you’re on the hunt for a nostalgic treat that brings back memories of simpler times, the Old Fashioned Oatmeal Cream Pie Cookies Recipe is just the answer. These delightful sandwich cookies combine chewy oats with a luscious marshmallow cream filling, creating a perfect balance of texture and sweetness that feels like a warm hug in dessert form. Whether you’re baking for family, friends, or yourself, this recipe captures the comforting essence of a classic treat with homemade goodness that feels extra special every bite.

Ingredients You’ll Need

A clear glass mixing bowl filled with a smooth, thick, light brown batter, showing soft, swirled peaks made by a white mixer paddle inside. Around the bowl, there are two white eggs, a small clear glass bowl with dark brown liquid, a white bowl with oats, a white bowl with white flour, and a small white dish with brown powder all placed on a pink surface. Photo taken with an iphone --ar 4:5 --v 7

The magic of this Old Fashioned Oatmeal Cream Pie Cookies Recipe lies in its simple, thoughtful ingredients. Each plays a crucial role, from the nutty texture of oats to the fluffy sweetness of marshmallow filling, crafting a cookie that is both tender and satisfyingly rich.

Unsalted butter (cold and cubed): Using cold butter helps create a tender cookie texture with a slight crispness at the edges.
Kosher salt: A pinch enhances flavor without overpowering sweetness, balancing the cookie perfectly.
Dark brown sugar (firmly packed): Adds deep caramel notes and moisture to keep the cookies chewy.
Pure vanilla extract: Infuses warmth and depth into both the cookie and cream filling.
Large eggs: Provide structure and help bind the dough while adding richness.
Baking soda: Gives the cookies just enough rise and tenderness.
Ground cinnamon: Offers a subtle, cozy spice that complements the oats wonderfully.
All-purpose flour: The base that forms the cookie’s structure while keeping it soft and chewy.
Quick oats: Deliver the signature rustic texture and wholesome flavor.
Unsalted butter (room temperature for filling): Creamed into the filling for smooth richness.
Confectioners’ sugar: Sweetens and lightens the marshmallow cream filling.
Vanilla extract (for filling): Enhances the cream’s flavor with a touch of elegance.
Marshmallow fluff: The star ingredient for that iconic pillowy cream filling.

How to Make Old Fashioned Oatmeal Cream Pie Cookies Recipe

Step 1: Prepare Your Oven and Baking Sheets

Start by preheating your oven to 350°F and prepping your baking sheets with parchment paper or silicone mats. This simple step ensures your cookies bake evenly and come off easily without sticking.

Step 2: Cream Butter and Salt

Using a stand mixer fitted with a paddle attachment, beat the cold, cubed butter with kosher salt on medium-high speed until softened, about 1 to 2 minutes. This creates a smooth base for your dough and helps develop flavor right from the start.

Step 3: Add the Sugar

Now, incorporate the dark brown sugar by mixing it on low speed until just combined, then crank it up to medium-high and beat until the mixture becomes light and fluffy, about 2 to 3 minutes. This step is key for a deliciously tender crumb that melts in your mouth.

Step 4: Mix in Vanilla and Eggs

Scrape down your bowl to keep everything even, then add the vanilla extract and eggs one at a time, beating on medium speed until perfectly blended. These ingredients enrich the dough and contribute to the moist texture.

Step 5: Combine Dry Ingredients Gradually

On low speed, mix in the baking soda and cinnamon until combined. Then add half of the flour and oats, mixing just until you still see streaks of both. Scrape the bowl, add the remaining flour and oats, and fold in until just combined. This method keeps the cookies tender without overmixing.

Step 6: Portion and Flatten Cookies

Use a cookie scoop to drop the dough onto your prepared sheets, spacing cookies about two inches apart. Lightly press down each ball to form a flattened dough disk — this helps them bake evenly and achieve that perfect chewy texture.

Step 7: Bake the Cookies

Bake for 9 to 12 minutes until the edges turn a light golden brown but the centers look slightly soft. This timing creates cookies that hold their shape yet remain tender.

Step 8: Shape Cookies into Perfect Rounds

If you want picture-perfect cookies, gently press a circular biscuit cutter into the hot cookies to smooth the edges before they cool. Let them rest on the pan for five minutes, then move to a cooling rack for complete cooling.

Step 9: Whip Up the Marshmallow Cream Filling

Beat room-temperature butter with a pinch of kosher salt until fluffy, then gradually add confectioners’ sugar and vanilla, mixing on low to incorporate before raising to high speed until light and airy. Finally, blend in marshmallow fluff until the entire filling is fluffy and dreamy.

Step 10: Assemble Your Cookies

Scoop about two tablespoons of filling onto the bottom of a cooled cookie, then sandwich with another cookie bottom side down. Press gently for a delightful sandwich that’s ooey, gooey, and irresistible.

How to Serve Old Fashioned Oatmeal Cream Pie Cookies Recipe

The image shows a group of round oatmeal cookies with a light brown color and a rough texture. They are arranged on a silver metal cooling rack, which is placed on a white marbled surface. Each cookie has visible oats throughout, giving a bumpy texture, and the edges are slightly darker, showing they are baked well. The cookies are close together, filling the space on the rack but not touching each other. photo taken with an iphone --ar 4:5 --v 7

Garnishes

Feel free to dust your sandwiches with a light sprinkle of cinnamon or a dusting of powdered sugar for an extra touch of sweetness and visual appeal. Adding a few toasted oats on top before the filling sets can also give a lovely rustic finish.

Side Dishes

These cookies pair delightfully with a cold glass of milk, coffee, or tea. For a decadent twist, serve alongside homemade vanilla ice cream or a scoop of fresh berries to balance out the sweetness with fresh fruity notes.

Creative Ways to Present

For a party or gift, stack these oatmeal cream pie cookies in cellophane bags tied with a rustic ribbon. Alternatively, create a dessert platter by arranging them around bowls of marshmallow fluff or fresh fruit preserves for a nostalgic yet elegant spread.

Make Ahead and Storage

Storing Leftovers

Keep your Old Fashioned Oatmeal Cream Pie Cookies Recipe fresh by storing in an airtight container at room temperature for up to four days. This helps maintain their chewy texture and moisture in the filling.

Freezing

You can freeze assembled cookies by wrapping them individually in plastic wrap and placing them in a freezer-safe container for up to three months. Thaw in the refrigerator before serving to keep the filling perfect.

Reheating

If you prefer your cookies slightly warm, gently heat them in a microwave for 10 to 15 seconds. Be careful not to melt the filling too much, just enough to bring out those cozy, freshly-baked flavors.

FAQs

Can I use old-fashioned oats instead of quick oats?

Absolutely! Using old-fashioned oats will give your cookies a heartier texture, though they may be a bit chewier. You might want to pulse them briefly in a food processor if you prefer a finer texture.

Is it necessary to use cold butter when starting the dough?

Yes, cold butter helps create a tender yet slightly crisp cookie. It slows the mixing process and prevents over-softening, which contributes to the perfect oatmeal cookie texture.

Can I substitute marshmallow fluff with something else?

If marshmallow fluff isn’t on hand, you can try homemade marshmallow creme or a light marshmallow spread. Keep in mind the texture or sweetness might shift slightly.

How can I make these cookies gluten-free?

Swap the all-purpose flour for a gluten-free flour blend that measures cup-for-cup, and ensure your oats are certified gluten-free. This will keep your cookies tasty and safe for gluten-sensitive friends.

Why are my cookies too flat after baking?

Flat cookies often come from too much butter melting too quickly or insufficient flour. Make sure to measure ingredients carefully and use cold butter as instructed to maintain structure.

Final Thoughts

Making the Old Fashioned Oatmeal Cream Pie Cookies Recipe at home is such a rewarding experience that combines nostalgic flavors with homemade love. I genuinely hope you enjoy every step and every bite of these delightful cookies. Once you try them, they’re bound to become a treasure in your recipe collection too — perfect for sharing or savoring all by yourself!