A homemade Marionberry Cake layered with marionberry jam and finished with marionberry buttercream. Dense, flavorful, and made entirely from scratch, this cake highlights fresh summer berries and becomes a repeat favorite whenever marionberries are in season.
This Marionberry Cake began as a spur-of-the-moment bake for an adult dessert at a birthday party. I had extra pound cake batter from another project and a bucket of freshly picked marionberries from a nearby farm, so I combined them into this rich, berry-forward cake.
Why I Love This Recipe
I love this recipe because it balances the bright tartness of marionberries with a moist, tender cake crumb. The jam between the layers and the marionberry-infused buttercream intensify the berry flavor while keeping the texture satisfying and not overly sweet. It’s the sort of cake that feels special but is straightforward to prepare.
What is a Marionberry?
Marionberries are a hybrid berry developed in Oregon. They resemble blackberries and offer a complex flavor that sits between blackberries and raspberries—sweet with a pleasant tartness. If marionberries are not available where you live, fresh blackberries or raspberries make suitable substitutions.
What is a Naked Cake?
A naked cake is intentionally left with little to no frosting on the sides so the layers and filling remain visible. This minimalistic style is popular for its rustic, elegant appearance. Typically the top is decorated with a light frosting layer, fresh fruit, or simple florals for a natural look.
How to Make a Quick Jam for Cake Filling
Combine berries, water, sugar, and a touch of cornstarch in a saucepan. Heat the mixture while mashing the berries, bring to a brief boil for about one minute, then remove from the heat to cool. As it cools, continue to mash to release juices and achieve a slightly chunky texture if desired. For a clearer syrup, strain the cooled mixture through a fine-mesh strainer to separate jam solids from syrup. Reserve both—the jam for the filling and the syrup for the frosting or drinks.
Recipe FAQs
Can I make this cake gluten-free or vegan? Yes. Swap in a tested gluten-free flour blend and follow any adjustments recommended for that blend. To make the cake vegan, replace eggs with a vegan egg substitute, use plant-based milk, and swap butter for vegan butter. Keep in mind texture and bake times may vary with substitutions.
How should I store leftover Marionberry cake? Store slices in an airtight container at room temperature for 1–2 days, or refrigerate for 3–4 days. For best flavor, bring refrigerated slices to room temperature before serving.
Can I freeze this cake? Yes. Freeze unfrosted cake layers wrapped tightly in plastic wrap and foil; thaw in the refrigerator and frost just before serving. You can also freeze fully assembled cakes, but texture and frosting appearance may change slightly.
What are good substitutes for marionberries? Fresh blackberries, raspberries, or a mixed berry combination work well as substitutes and will still yield a delicious result.
Marionberry Vodka Lemonade
The syrup left over from making the jam makes a fantastic summer cocktail when combined with lemonade and vodka. Use prepared or homemade lemonade, add about 1/4 cup marionberry syrup per pitcher (adjust to taste), then stir in vodka to your preference—about 1–2 shots per serving. Serve over ice and garnish with fresh berries for a refreshing adult beverage that highlights the marionberry flavor.
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Naked Marionberry Cake
Ingredients
Pound Cake
- ¾ cup unsalted butter, room temp
- 2 cups sugar
- 2 teaspoon vanilla extract
- 3 large eggs, room temp
- 3½ cups all-purpose flour
- 4½ teaspoon baking powder
- ½ teaspoon kosher salt
- 1½ cups milk, room temp
Marionberry Jam/Syrup
- 2–3 cups fresh marionberries, rinsed
- 1 cup water
- 1 cup sugar
- ½ teaspoon cornstarch
Marionberry Frosting
- ¼ cup unsalted butter, room temp
- ¾ cup vegetable shortening
- 1¼ teaspoon vanilla extract
- 1 pinch kosher salt
- 4 cups powdered sugar
- 2–3 teaspoons water
- ¼ cup marionberry syrup
Instructions
Pound Cake
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Preheat the oven to 350°F (175°C). Prepare two 6″ round pans or a single pan with non-stick spray and parchment.
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Whisk together the flour, baking powder, and salt in a bowl until combined.
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In a separate bowl, cream butter and sugar with a mixer, then add vanilla. Add eggs one at a time, mixing well after each addition.
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Alternate adding the dry mixture and milk to the butter mixture in thirds, beginning and ending with the dry ingredients. Mix until just combined.
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Divide batter between prepared pans and bake for 30–35 minutes, or until a toothpick inserted into the center comes out clean. Cool completely before assembling.
Marionberry Jam/Syrup
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Combine marionberries, water, sugar, and cornstarch in a saucepan. Bring to a boil while stirring and mashing the berries. Boil for about one minute then remove from heat and let cool slightly.
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Mash the berries as the mixture cools. If desired, strain through a fine-mesh strainer to separate the jam solids from the syrup; reserve both for filling and frosting.
Marionberry Frosting
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Beat butter and shortening until smooth. Add vanilla and salt and mix to combine.
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Add powdered sugar one cup at a time on low speed, increasing to medium-high briefly after each addition. Add about 1 tablespoon of water after each cup to reach the right consistency.
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Stir in marionberry syrup and mix until smooth and evenly colored. Adjust thickness with more powdered sugar or a little water if needed.
How to Build the Cake
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Place one cake layer on a cake stand and secure with a small dollop of frosting. Spread a thick layer of marionberry jam on the layer, leaving about ¼” clear at the edge.
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Flip the second cake layer so the flat bottom faces up, which creates an even top surface.
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Apply a thin crumb coat of frosting and chill in the freezer 5–10 minutes to set. Finish with a thin, semi-transparent “naked” layer of frosting so some cake remains visible, or fully frost if you prefer a classic finish.
Notes
- This recipe yields a generous amount of frosting. If you prefer the naked look, consider halving the frosting recipe; keep the full amount if you plan to fully frost the cake.
Nutrition
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Calories: 510 kcal
Nutrition values are estimates and can vary based on ingredient brands and portion sizes. Verify using your own calculations if needed.
Lemonade Photo by Izabelle Acheson on Unsplash.