This layered vanilla cake is packed with wild blueberries in the cake, swirled with a glossy blueberry sauce, and finished with a silky blueberry frosting. With blueberry in every component, this triple-blueberry cake delivers bright fruit flavor and moist, tender layers—perfect for summer gatherings or any time you crave a berry-forward dessert.
Blueberry lovers will appreciate how the cake, sauce, and frosting complement each other to create a balanced, fruity dessert. The cake layers stay soft and moist, the sauce adds fresh-tasting brightness and texture, and the frosting brings a creamy finish with pronounced blueberry notes. When fresh berries are in season this is a must-bake.
Why This Recipe Works
- Triple blueberry: Blueberry appears in the cake batter, the sauce, and the frosting for a layered and consistent flavor profile.
- Moist, tender crumb: The combination of butter, sour cream, and buttermilk keeps the cake soft and prevents dryness.
- Accessible layer cake: The method breaks the process into straightforward steps so you can achieve beautiful layers without complicated techniques.
Ingredient Notes
A few tips about ingredients to ensure the best texture and flavor. See the recipe card below for exact quantities.
- Eggs: Use large eggs at room temperature for a smoother, more even batter.
- Buttermilk: Full-fat or reduced-fat buttermilk works best; bring it to room temperature before mixing.
- Sour cream: Full-fat sour cream gives richness; plain yogurt can be used as a substitute.
- Unsalted butter: Softened to room temperature makes creaming easier and yields a lighter crumb.
- Powdered sugar: Sift for a smooth, lump-free frosting.
- Blueberries: Wild blueberries are ideal because their small size distributes throughout the batter evenly, but regular blueberries work fine. Thaw frozen berries before making the sauce.
Step By Step Instructions – Cake layers
These instructions describe making three 8-inch cake layers. You’ll need an electric mixer (stand mixer with paddle attachment recommended).
STEP 1: Prep. Preheat the oven to 350°F. Spray three 8-inch round cake pans with nonstick baking spray, line bottoms with parchment circles, and spray again.
STEP 2: Dry ingredients. In a medium bowl sift together all-purpose flour, baking powder, baking soda, and salt.
STEP 3: Coat blueberries. Toss the blueberries with a tablespoon of flour to prevent them from sinking.
STEP 4: Wet ingredients. Cream the butter and sugar in the stand mixer on high for 3 minutes until light and fluffy. Scrape the bowl, then add vanilla, sour cream, and eggs and mix on medium until combined.
STEP 5: Combine batter. Add one-third of the dry ingredients and half the buttermilk to the wet mixture, mixing on low to combine. Repeat with another third of the dry ingredients and the remaining buttermilk, then add the remaining dry ingredients. Remove the bowl from the mixer and gently fold in the coated blueberries with a rubber spatula.
STEP 6: Pour batter. Divide the batter evenly between the three prepared pans.
STEP 7: Bake. Bake 22–25 minutes, or until a toothpick inserted in the center comes out clean.
STEP 8: Cool. Let the cakes cool in the pans for 10 minutes, then transfer to a wire rack to cool completely before decorating.
Step By Step Instructions – Blueberry Sauce and Frosting
Prepare the sauce and frosting while the cakes cool. A mixer is required for the frosting.
STEP 1: Simmer sauce. In a medium saucepan combine blueberries, sugar, water, lemon juice, and cornstarch. Heat over medium until the berries release their juices and the mixture comes to a simmer. If using frozen berries, thaw first.
STEP 2: Thicken and cool. Cook about 5 minutes until thickened. Pour into a heat-safe bowl and chill completely in the refrigerator (or speed-cool in the freezer).
STEP 3: Prepare powdered sugar. Sift the powdered sugar into a large bowl and set aside.
STEP 4: Beat butter. Beat the butter on high speed for 3 minutes until light and fluffy.
STEP 5: Add sugar. Add half the powdered sugar on low speed until incorporated, then add the rest and mix until smooth.
STEP 6: Flavor and finish. Mix in vanilla, blueberry sauce, salt, and optionally ground freeze-dried blueberries for extra color and intensity. Start on low speed to combine, then increase to high speed until the frosting is creamy.
Note: Freeze-dried blueberries are optional but boost both color and blueberry flavor if available.
Assembling the Cake Tips
- Trim any domes with a serrated knife so each layer sits flat.
- Stabilize your bottom layer by piping a small dollop of frosting onto the cake board before placing the first layer.
- Spread about 3/4 cup frosting on the first layer, pipe a frosting border around the edge, and spoon 1/2 cup blueberry sauce into the center.
- Repeat for the second layer. Place the final layer with its bottom facing up for the flattest finish.
- Apply a thin crumb coat to seal crumbs, then chill or freeze for 15 minutes before the final coat.
- Frost the cake fully, chill briefly, then spoon remaining blueberry sauce over the top before serving.
FAQ
Yes. Half the recipe yields about 12 cupcakes. Bake in a muffin tin for 18–20 minutes and use the blueberry sauce as a filling if desired.
You can also use two 9-inch pans, four 6-inch pans, or a 9×13-inch pan (you may need to halve the frosting for the 9×13). Halve the recipe to fill three 6-inch pans or an 8×8/9×9 square pan.
Yes. Once cool, wrap layers tightly in plastic wrap and freeze up to 30 days. Thaw about an hour before decorating.
Storing and Freezing
Store the assembled cake in an airtight cake carrier in the refrigerator for up to 5 days.
Freezing
Slices freeze well. Place individual slices in an airtight container and freeze up to 30 days. Thaw in the refrigerator before serving.
Other Fruit Cake Recipes To Try
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Blueberry Cake
Ingredients
Blueberry Cake
- 3 1/2 cups All-purpose flour
- 1 TBSP Baking powder
- 1/2 tsp Baking soda
- 1 tsp Salt
- 1 cup Unsalted butter, room temperature
- 1 3/4 cup White granulated sugar
- 1 tsp Pure vanilla extract
- 1/2 cup Sour cream, room temperature (or plain yogurt)
- 4 Large eggs, room temperature
- 1 cup Buttermilk, room temperature
- 1 1/4 cup Frozen wild blueberries
- 1 TBSP All-purpose flour (for coating berries)
Blueberry Sauce
- 1 lb Blueberries (fresh or frozen)
- 1/2 cup White granulated sugar
- 1/3 cup Water
- 2 TBSP Lemon juice
- 1 TBSP Cornstarch
Blueberry Frosting
- 2 cups Unsalted butter, room temperature
- 2 cups Powdered sugar, sifted
- 1 tsp Pure vanilla extract
- 2 TBSP Blueberry sauce
- 1/2 tsp Salt
- 1 oz Ground freeze-dried blueberries (optional)
Instructions
Blueberry Cake
- Preheat oven to 350°F. Prepare three 8-inch pans with spray and parchment.
- Sift dry ingredients. Toss blueberries with 1 TBSP flour and set aside.
- Cream butter and sugar 3 minutes. Add vanilla, sour cream, and eggs; mix until combined.
- Alternate adding dry ingredients and buttermilk in thirds, mixing on low. Fold in blueberries by hand.
- Divide batter between pans and bake 22–25 minutes until a toothpick is clean.
- Cool in pans 10 minutes, then on a wire rack until completely cool.
Blueberry Sauce
- Combine blueberries, sugar, water, lemon juice, and cornstarch in a saucepan. Simmer until thickened, about 5 minutes. Chill completely.
Blueberry Frosting
- Sift powdered sugar. Beat butter until fluffy, add powdered sugar in two additions, then vanilla, blueberry sauce, salt, and optional freeze-dried blueberry powder. Beat until creamy.
Assembly
- Level layers, pipe a small amount of frosting to secure the first layer to the board, spread frosting and blueberry sauce between layers, and continue stacking.
- Apply a crumb coat, chill 15 minutes, finish frosting, chill briefly, then spoon remaining sauce on top.
Notes
High altitude: Add an extra 3 TBSP flour if needed.
Bring dairy ingredients to room temperature about 2 hours before baking.
, Carbohydrates: 71 g
, Protein: 4 g
, Fat: 37 g