A warm memory in three bites: the soft, oat-scented crumb holding a cloud of vanilla buttercream, a glaze that glints like late-afternoon light, and the sweet crunch of cookie crumbs on top. Baking this cake feels like wrapping a familiar childhood treat in a silk scarf — comforting, a little glamorous, and utterly irresistible.
Why make this recipe
Because it turns the humble oatmeal cream pie into a show-stopping layer cake: nostalgic flavors with grown-up texture and presentation. This recipe is perfect for birthdays, brunches, or any moment when you want to surprise friends with something both familiar and unforgettable.
How to make Oatmeal Cream Pie Cake
Think of this cake as three components: a tender, oatmeal-suffused sponge; a vanilla-forward Swiss-cream-style buttercream; and a glossy white chocolate glaze studded with cookie crumbs. You’ll cook oats for depth, fold them into a rich batter, build tall layers with generous frosting, and finish with a cascading glaze and crumbled oatmeal cookie pieces for that playful, nostalgic crunch.
Ingredients:
- 2 1/2 cups water
- 2 cups quick cook oats (uncooked)
- 2 2/3 cup all purpose flour (see notes below for measuring)
- 1 tbsp + 1 tsp ground cinnamon
- 1 teaspoon fine sea salt
- 1/2 tsp nutmeg
- 2 teaspoon baking soda
- 1 cup unsalted butter (room temperature)
- 1 cup Domino® Granulated Sugar
- 1 cup Domino® Light Brown Sugar (packed)
- 1 tbsp vanilla extract
- 3 large eggs (room temperature)
- 1/4 cup full-fat sour cream (room temperature)
- 2 1/2 cups unsalted butter (room temperature)
- 4 cups powdered sugar
- 2 tbsp heavy cream
- 2 tsp vanilla extract
- 1 tsp vanilla bean paste
- 1 cup white chocolate chips
- 1/4 cup + 3 tbsp heavy cream
- white food coloring (optional but makes the glaze more white instead of yellow)
- oatmeal cream pie cookies (for decorating)
Directions:
- Preheat the oven to 350 F/180 C. Line three 8-inch cake pans with parchment paper on the bottoms and set them aside.
- Bring a pot of water to a boil. Add in the oats, stir, and remove the pot from the heat. Cover the pot for 20 minutes. Let the oatmeal cool to room temperature before using.
- Whisk together the flour, baking soda, salt, cinnamon, and nutmeg and set aside.
- In a stand mixer, beat the butter and sugars together on medium speed for 5 minutes until light and fluffy. Add in the vanilla, eggs, and sour cream and mix until combined, scraping the sides of the bowl as necessary.
- Mix in the cooked oats and mix until just combined. Then fold in the flour mixture, mixing until just combined. It will be a very thick batter!
- Spread batter into pans (around 600g each). Bake for 20-22 mins, until a toothpick comes out covered in a few moist crumbs. Cool in pans on a wire rack, then run a spatula around the edges to flip them out.
- Next, make the buttercream. In a stand mixing bowl, beat the butter on medium speed until light and fluffy. Then mix in the powdered sugar on low speed. Once combined, increase the speed to medium and beat until the buttercream is light and fluffy, about 3-5 minutes. Mix in the heavy cream, vanilla extract, and vanilla bean paste.
- Assemble by placing an oatmeal cake layer on a stand. Spread 1 cup of vanilla frosting on top. Add the next layer. Alternate cake and frosting layers, finishing with the top layer upside down for a flat surface.
- Spread the rest of the frosting across the sides and top of the cake in a thin, even layer. Set the cake aside while you make the glaze.
- Heat cream on the stove or microwave, then pour over the white chocolate chips, stirring to combine. Add the white food coloring for a less yellow tone (optional). Let it cool before pouring it over the cake to avoid melting the frosting.
- Put the cake on a wire rack with a pan below. Pour the glaze in the center, spreading it to the edges so it falls off the sides. Let the glaze finish running off and set. Then decorate the top of the cake with crumbled oatmeal pie cookie crumbs and pieces.
How to serve Oatmeal Cream Pie Cake
Slice with a sharp knife dipped in hot water for clean layers. Serve slightly chilled or at cool room temperature so the buttercream holds shape but the cake remains tender. Pair with a milk latte, cold brew, or a bright herbal tea to balance the buttery sweetness.
How to store Oatmeal Cream Pie Cake
Cover the cake loosely with a cake dome and refrigerate for up to 4 days. For longer storage, slice into portions and freeze in airtight containers for up to 3 months — thaw overnight in the fridge and bring to cool room temperature before serving.
Tips to make Oatmeal Cream Pie Cake
- Measure your flour properly: spoon it into the cup and level off to avoid a dense cake.
- Let the cooked oats cool completely before folding into batter to prevent a broken emulsion.
- Use room-temperature eggs and sour cream to help the batter come together smoothly.
- Chill the cake briefly after the crumb coat if your kitchen is warm — it makes glazing and final smoothing much easier.
- If you want a whiter glaze, a tiny drop of white food coloring will help offset the natural yellow of white chocolate.
Variations (if any)
- Maple Twist: Replace 2 tbsp of heavy cream in the buttercream with 1 tbsp maple syrup for a cozy maple note.
- Spiced Add-in: Fold 1/2 cup toasted chopped walnuts or pecans into the batter for added crunch and warmth.
- Chocolate Drip: Swap the white chocolate glaze for a dark chocolate ganache for a richer contrast to the sweet cream filling.
FAQs
Q: Can I use old-fashioned oats instead of quick cook oats?
A: Yes — you can, but cook them a little longer (or let them sit covered for 30 minutes) so they soften fully. You may notice a heartier texture.
Q: My glaze thickened before I poured it. What should I do?
A: Gently rewarm it in short bursts in the microwave or over a double boiler, stirring until pourable but not hot.
Q: Can I make the cake layers ahead of time?
A: Absolutely. Bake the layers, wrap them tightly in plastic wrap, and refrigerate for up to 2 days or freeze for up to 3 months. Thaw in the refrigerator before assembling.
Q: Is there a vegan version of this cake?
A: You can adapt with plant-based butter, aquafaba or flax eggs, and a vegan white chocolate alternative, but expect slight texture and flavor changes.
Conclusion
If you love the nostalgic charm of an oatmeal cream pie but want to present it as a centerpiece, this cake is your cinematic remix — familiar, elegant, and bursting with layered textures. For inspiration and a slightly different take on this concept, check this lovely rendition at Oatmeal Cream Pie Layer Cake – Love and Confections, and see another beautiful version here: Oatmeal Cream Pie Cake – Willow Bird Baking. Happy baking — may your kitchen smell like warm oats and vanilla, and may every slice bring someone a small, joyful surprise.
Oatmeal Cream Pie Cake
Ingredients
Method
- Preheat the oven to 350 F/180 C. Line three 8-inch cake pans with parchment paper on the bottoms and set them aside.
- Bring a pot of water to a boil. Add in the oats, stir, and remove the pot from the heat. Cover the pot for 20 minutes. Let the oatmeal cool to room temperature before using.
- Whisk together the flour, baking soda, salt, cinnamon, and nutmeg and set aside.
- In a stand mixer, beat the butter and sugars together on medium speed for 5 minutes until light and fluffy.
- Add in the vanilla, eggs, and sour cream and mix until combined, scraping the sides of the bowl as necessary.
- Mix in the cooked oats and mix until just combined. Then fold in the flour mixture, mixing until just combined. It will be a very thick batter!
- Spread batter into pans (around 600g each). Bake for 20-22 mins, until a toothpick comes out covered in a few moist crumbs.
- Cool in pans on a wire rack, then run a spatula around the edges to flip them out.
- In a stand mixing bowl, beat the butter on medium speed until light and fluffy.
- Then mix in the powdered sugar on low speed. Once combined, increase the speed to medium and beat until the buttercream is light and fluffy, about 3-5 minutes.
- Mix in the heavy cream, vanilla extract, and vanilla bean paste.
- Place an oatmeal cake layer on a stand. Spread 1 cup of vanilla frosting on top.
- Add the next layer. Alternate cake and frosting layers, finishing with the top layer upside down for a flat surface.
- Spread the rest of the frosting across the sides and top of the cake in a thin, even layer. Set the cake aside while you make the glaze.
- Heat cream on the stove or microwave, then pour over the white chocolate chips, stirring to combine.
- Add the white food coloring for a less yellow tone (optional). Let it cool before pouring it over the cake to avoid melting the frosting.
- Put the cake on a wire rack with a pan below. Pour the glaze in the center, spreading it to the edges so it falls off the sides.
- Let the glaze finish running off and set. Then decorate the top of the cake with crumbled oatmeal pie cookie crumbs and pieces.