Ingredients
Chocolate Sponge Biscuit
- 100 grams (3.5 ounces) sugar
- 100 grams (3.5 ounces) eggs
- 45 grams (1.6 ounces) egg yolks
- 60 grams (2.1 ounces) egg whites
- 60 grams (2.1 ounces) flour
- 20 grams (0.7 ounces) cocoa
- 20 grams (0.7 ounces) butter
Blueberry Jam
- 180 grams (6.3 ounces) frozen blueberries
- 50 grams (1.8 ounces) sugar
- 7 grams (0.25 ounces) cornstarch
- 30 milliliters (2 tablespoons) water
Chocolate Cream
- 240 grams (8.5 ounces) cream cheese
- 75 grams (2.6 ounces) cream 33%
- 40 grams (1.4 ounces) sugar
- 45 grams (1.6 ounces) bitter chocolate
Equipment
- Mixing Bowls
Several different sizes will be helpful for separating and mixing different ingredients.
- Electric Mixer
An electric hand mixer or stand mixer is essential for whipping up the eggs and cream cheese mixtures.
- Whisk
A hand whisk is great for blending ingredients and ensuring a smooth texture.
- Baking Sheet and Mat
Use a non-stick silicone or teflon mat on your baking sheet to prevent sticking and ensure an even bake.
- Spatula
A flexible spatula will help you fold ingredients together without losing airiness.
- Cling Film
Essential for wrapping and stabilizing the roll in the fridge.
Instructions
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Servings
Variations
Faq
- Why is my sponge cake too dry?
Overbaking can cause the sponge cake to dry out. Be sure to keep an eye on it and remove it from the oven once it appears set and springy.
- How do I prevent my roll from cracking?
Make sure not to overbake the sponge and roll it while it is still slightly warm.
- Can I make the components in advance?
Yes, you can prepare the sponge, jam, and cream up to a day in advance and assemble the roll just before serving.
- Can I use fresh blueberries instead of frozen?
Absolutely! Fresh blueberries work just as well, though you might need to adjust the cooking time slightly as they have less moisture than frozen ones.
- How can I make my whipped cream fluffier?
Ensure that both your cream and mixing bowl are very cold before whipping. This helps incorporate more air for a lighter texture.
- What's the best way to melt chocolate without burning it?
Use a double boiler or microwave it in short bursts, stirring in between to avoid overheating.