Description
This Blueberry Upside-Down Cake is a stunning, vintage-inspired dessert that turns a simple sponge into a show-stopping centerpiece. Featuring a caramel-like base of melted butter and brown sugar topped with juicy blueberries, the cake is finished with a unique, light-as-air crumb achieved by folding in whipped egg whites. When flipped, the warm juices soak into the sponge for a moist, jammy glaze.
Ingredients
The Blueberry Topping
- 1 1/2 cups fresh blueberries
- 1/3 cup brown sugar
- 2 tbsp butter
The Airy Sponge
- 1 1/2 cups all-purpose flour
- 3/4 cup granulated sugar
- 1/2 cup butter, softened
- 1/2 cup milk
- 2 large eggs, separated (whites and yolks)
- 2 tsp baking powder
- 1 tsp vanilla extract
- 1/2 tsp salt
Instructions
Step 1: Prep and Caramelize
Preheat your oven to 350F. Thoroughly spray a 9-inch cake pan with cooking spray. In a small saucepan over low heat, melt the brown sugar and 2 tbsp butter until the sugar dissolves. Pour this mixture into the bottom of the cake pan and arrange the blueberries in a single even layer on top.
Step 2: Whip Egg Whites
In a clean, grease-free bowl, beat the 2 egg whites at high speed until stiff peaks form. Set these aside for later.
Step 3: Mix the Batter
In a separate large bowl, cream together 1/2 cup softened butter and 3/4 cup granulated sugar until fluffy. Add the egg yolks and vanilla; beat well. Gradually add the flour, baking powder, and salt to the mixture, alternating with the milk, until just combined.
Step 4: Fold and Bake
Gently fold the stiff egg whites into the thick batter using a cut and fold motion until no white streaks remain. Spread the batter carefully over the blueberries. Bake for 55-60 minutes until a tester comes out clean.
Step 5: The Flip
Cool the cake in the pan for 15 minutes. Place a platter over the pan and flip it over. Leave the pan resting on the cake for 5-10 minutes before lifting to let the juices soak into the sponge.
Notes
The Resting Flip: Leaving the pan on the cake for 5-10 minutes after flipping is critical. This forces the blueberry caramel into the sponge for a moist finish.
Grease-Free Whites: Ensure your bowl and beaters are perfectly clean. Any trace of fat will prevent the egg whites from reaching the volume needed for a cloud-like lift.
Batter Thickness: This batter is significantly thicker than standard mixes. It is designed to be sturdy enough to support the fruit layer without the berries floating into the center.
Pan Sizing: Use a standard 9-inch round pan. Avoid springform pans as the caramel may leak out during baking.
- Prep Time: 20 minutes
- Cook Time: 60 minutes
- Category: Dessert / Cake
- Method: Separated Egg Method / Inversion
- Cuisine: Traditional American
Nutrition
- Serving Size: 1 Slice
- Calories: 320
- Sugar: 26g
- Sodium: 240mg
- Fat: 14g
- Saturated Fat: 9g
- Unsaturated Fat: 5g
- Trans Fat: 0.4g
- Carbohydrates: 44g
- Fiber: 1g
- Protein: 4g
- Cholesterol: 75mg
Keywords: blueberry upside down cake, vintage cake recipes, whipped egg white cake, blueberry caramel cake, fresh fruit desserts, moist blueberry sponge, upside down berry cake