Equipment
Ingredients
Cranberry Puree
- 300 g cranberries, fresh or frozen
- 100 g granulated sugar
- 30 ml water
Lemon Sponge
- 6 eggs, room temperature
- 150 g caster sugar
- 120 g cake flour
- 2 g salt
- 50 ml whole milk
- 50 ml neutral oil
- 10 g lemon zest, finely grated
Cranberry Mascarpone Filling
- 250 g mascarpone cheese, cold
- 150 ml heavy cream, cold
- 50 g powdered sugar, sifted
Lemon Buttercream Exterior
- 200 g unsalted butter, room temperature
- 200 g powdered sugar, sifted
- 30 ml lemon juice, freshly squeezed
Nutrition (per serving)
Nutrition is estimated per serving. Nutrients without complete source data are omitted.
Full nutrition
- Calories
- 639 kcal
- Protein
- 7 g
- Carbohydrates
- 72 g
- Fat
- 40 g
- Fiber
- 2 g
- Sugar
- 54 g
- Sodium
- 140 mg
- Saturated Fat
- 22 g
- Trans Fat
- 0 g
- Monounsaturated Fat
- 7 g
- Polyunsaturated Fat
- 1 g
- Cholesterol
- 172 mg
- Potassium
- 109 mg
- Calcium
- 97 mg
- Iron
- 1.5 mg
- Magnesium
- 10 mg
- Phosphorus
- 91 mg
- Zinc
- 0.6 mg
- Vitamin A
- 384 mcg
- Vitamin C
- 7 mg
- Vitamin D
- 0.9 mcg
- Vitamin E
- 1.3 mg
- Vitamin K
- 4 mcg
- Vitamin B6
- 0.1 mg
- Vitamin B12
- 0.3 mcg
- Thiamin
- 0.13 mg
- Riboflavin
- 0.25 mg
- Niacin
- 0.9 mg
- Folate
- 39 mcg
- Water
- 74 g
Sources: Aggregated Public Data, USDA FoodData Central
Method
Preheat the oven to 190°C (375°F). Line a 33x45cm half sheet pan with parchment paper, ensuring the paper extends slightly up the sides.
Combine the cranberries, granulated sugar, and water in a saucepan. Simmer over medium heat until the berries burst and the mixture thickens. Blend into a smooth puree and set aside to cool completely.
In a stand mixer, whip the eggs and caster sugar on high speed until the mixture is pale, thick, and has tripled in volume, reaching the ribbon stage.
Gently fold the sifted cake flour and salt into the whipped eggs in three additions to maintain aeration. In a small bowl, whisk together the milk, oil, and lemon zest, then fold this liquid mixture gently into the batter.
Pour the batter into the prepared half sheet pan, spreading it evenly to the edges with an offset spatula. Bake at 190°C (375°F) for 10 to 12 minutes.
Turn the warm cake out onto a clean piece of parchment paper. Carefully peel off the baking parchment. Immediately drape a clean kitchen towel over the sponge to trap the steam, allowing it to cool completely while remaining flexible.
In a stand mixer, whip the cold mascarpone, heavy cream, and 50g of powdered sugar until stiff peaks form. Gently fold in 150g of the cooled cranberry puree to create a vibrant pink, stable filling.
Using a serrated knife, cut the cooled sponge cake lengthwise into three equal strips, each approximately 11cm wide.
Spread the pink cranberry filling in an even layer across the three cake strips, leaving a small 1cm border at the edges to prevent the filling from squeezing out during rolling.
Roll the first strip tightly into a coil. Stand it upright on a flat serving platter. Carefully pick up the second strip and wrap it around the first, matching the seams. Repeat with the third strip to create a large, continuous spiral.
Whip the room temperature butter, 200g of powdered sugar, and lemon juice until completely smooth, pale, and fluffy to create the exterior frosting.
Frost the top and sides of the upright spiral cake with the lemon buttercream, smoothing the edges with an offset spatula.
Refrigerate the fully assembled cake for at least 3 hours to allow the mascarpone filling and buttercream to set completely, ensuring clean vertical slices.
Chef's Notes
- A flexible sponge relies entirely on trapped moisture. Never skip covering the cake with a towel or parchment paper immediately after it comes out of the oven.
- Applying a very thin crumb coat of buttercream before the final frosting helps lock in the shape of the spiral and catches any errant pink crumbs.
- For the cleanest vertical slices that highlight the striking pink stripes, chill the cake thoroughly and use a sharp, warm serrated knife wiped perfectly clean between every single cut.
Storage
Refrigerator: 4 days — Keep in an airtight cake dome to prevent the buttercream from absorbing fridge odors.
Freezer: 1 month — Freeze whole or in individual slices wrapped tightly in plastic wrap.
Troubleshooting
Sponge cracks while rolling into a spiral
Cause: The cake was overbaked or allowed to cool uncovered, causing it to dry out and lose its elasticity
Fix: Patch any cracks with a little extra buttercream and continue rolling. The vertical assembly hides interior faults perfectly.
Prevention: Bake only until the cake just springs back, and trap the steam immediately by covering it with a towel while cooling
Filling squishes out the sides during assembly
Cause: Filling layer is too thick or the room is too warm, causing the mascarpone cream to melt
Fix: Scrape away excess filling with an offset spatula and chill the cake for 15 minutes before applying the exterior frosting.
Prevention: Apply a thin, even layer of filling and ensure a border is left on the edges. Chill the filling briefly if the room is hot.
Cultural Context
The vertical layer cake transforms the classic European roulade into a modern architectural marvel. By slicing a thin sheet sponge into ribbons and coiling them into a continuous upright spiral, bakers create a stunning trompe l'oeil effect that elevates standard layer cakes into memorable holiday centerpieces.
