Oatmeal Cream Pie Cake

There’s something undeniably comforting about a sweet treat that evokes nostalgia. This delightful cake brings together the classic flavors of oatmeal cream pies into a moist and luscious dessert that’s sure to impress. My own experience with this creation has been nothing short of delightful; each bite transports me back to cherished childhood memories.

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oatmeal cream pie cake 2026 02 16 141841 1

Oatmeal Cream Pie Cake


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  • Author: Lorena Kensley
  • Total Time: 50 minutes
  • Yield: 8 servings
  • Diet: Vegetarian

Description

A moist and luscious cake that combines the classic flavors of oatmeal cream pies into a delightful dessert, perfect for any gathering.


Ingredients

  • 1 ½ cups all-purpose flour
  • 1 cup granulated sugar
  • 1 tsp baking powder
  • 1 tsp baking soda
  • ½ tsp salt
  • 1 cup rolled oats
  • ½ cup buttermilk
  • ½ cup vegetable oil
  • 3 large eggs
  • 1 tsp vanilla extract
  • 1 cup unsalted butter, softened
  • 4 cups powdered sugar
  • ½ cup marshmallow fluff
  • 1 tsp vanilla extract (for filling)


Instructions

  1. Preheat your oven to 350°F (175°C) and grease two 9-inch round cake pans.
  2. In a bowl, mix the flour, sugar, baking powder, baking soda, salt, and oats.
  3. In another bowl, whisk together buttermilk, oil, eggs, and vanilla.
  4. Combine the wet and dry ingredients, mixing until just combined.
  5. Divide the batter evenly into the prepared pans and smooth the tops.
  6. Bake for 25-30 minutes or until a toothpick inserted in the center comes out clean.
  7. Allow the cakes to cool in the pans for 10 minutes, then transfer to wire racks to cool completely.
  8. For the filling, beat the butter until creamy, then slowly add powdered sugar, marshmallow fluff, and vanilla until smooth.
  9. Once the cakes are cool, place one layer on a serving platter and spread a generous portion of filling on top. Add the second layer and frost the top and sides.

Notes

For an extra depth of flavor, consider adding a pinch of cinnamon to the batter. You can also customize the filling by swapping vanilla extract for almond or adding shredded coconut or mini chocolate chips.

  • Prep Time: 20 minutes
  • Cook Time: 30 minutes
  • Category: Dessert
  • Method: Baking
  • Cuisine: American

Why you’ll love this dish

This cake is not just a dessert; it’s an experience. Perfect for gatherings, celebrations, or simply an afternoon treat with a cup of coffee, it brings smiles and satisfaction. The harmonious blend of textures—soft cake, creamy filling, and chewy oats—creates a decadence that’s undeniably appealing.

“Every bite was like a hug from my childhood!”

How this recipe comes together

Baking this cake is straightforward and rewarding. You’ll combine dry and wet ingredients, allowing the finely-tuned balance to shine. Once baked, it gets layered with a creamy frosting that effortlessly enhances the flavor profile.

Prep Time: 20 min | Cook Time: 30 min | Total Time: 50 min

What you’ll need

  • 1 ½ cups all-purpose flour
  • 1 cup granulated sugar
  • 1 tsp baking powder
  • 1 tsp baking soda
  • ½ tsp salt
  • 1 cup rolled oats
  • ½ cup buttermilk
  • ½ cup vegetable oil
  • 3 large eggs
  • 1 tsp vanilla extract

For the filling:

  • 1 cup unsalted butter, softened
  • 4 cups powdered sugar
  • ½ cup marshmallow fluff
  • 1 tsp vanilla extract

Step-by-step instructions

  1. Preheat your oven to 350°F (175°C) and grease two 9-inch round cake pans.
  2. In a bowl, mix the flour, sugar, baking powder, baking soda, salt, and oats.
  3. In another bowl, whisk together buttermilk, oil, eggs, and vanilla.
  4. Combine the wet and dry ingredients, mixing until just combined.
  5. Divide the batter evenly into the prepared pans and smooth the tops.
  6. Bake for 25-30 minutes or until a toothpick inserted in the center comes out clean.
  7. Allow the cakes to cool in the pans for 10 minutes, then transfer to wire racks to cool completely.
  8. For the filling, beat the butter until creamy, then slowly add powdered sugar, marshmallow fluff, and vanilla until smooth.
  9. Once the cakes are cool, place one layer on a serving platter and spread a generous portion of filling on top. Add the second layer and frost the top and sides.

Best ways to enjoy it

This cake shines when enjoyed fresh, but it can also be enhanced with a scoop of vanilla ice cream on the side. Serving it with coffee or a glass of milk adds to the nostalgic experience. For a festive touch, consider sprinkling some crushed oats or chocolate shavings on top.

Storage and reheating tips

To keep the cake at its best, store it in an airtight container at room temperature for up to three days. If you need to keep it longer, refrigerate it for about a week. You can also freeze slices—just ensure they’re well wrapped to prevent freezer burn.

Helpful cooking tips

For an extra depth of flavor, consider adding a pinch of cinnamon to the batter. This small tweak can elevate the warm, comforting notes of the cake. Always use room temperature eggs and buttermilk, as this ensures a more even batter and a fluffier cake.

Creative twists

Feel free to customize the filling! Swap out regular vanilla extract for almond for an unexpected twist. You can also incorporate ingredients like shredded coconut or mini chocolate chips into the cake batter for added flavor and texture.

FAQ

Can I use gluten-free flour?

Absolutely! Just substitute the all-purpose flour with a 1:1 gluten-free blend, and ensure that the other ingredients are also gluten-free.

How can I make this cake dairy-free?

Simple! Use almond milk or oat milk in place of buttermilk and substitute the butter with a plant-based alternative.

What’s the best way to serve leftovers?

Leftover slices are delightful served slightly chilled. Consider microwaving for a few seconds to warm it slightly, enhancing the creamy filling’s texture.

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