Sugar-free Rilakkuma Chocolate Swiss Roll

 In the midst of writing Deco Marshmallows, I couldn't resist taking a little time out to make this simple bake because we stumbled across an awesome source of chocolate that is 100% cacao with no sugar added BUT is so smooth! Once we tasted the chocolate chips which were suitable for use in baking and making hot chocolate, I knew I had to try it for my bakes. Most other 100% cacao chocolate we have tasted tend to be a little dry and gritty. Here's my rich chocolate swiss roll made without white sugar!

Even the decoration for Rilakkuma is made without white sugar!

The Swiss roll is made of sugar-free chocolate chiffon sponge and sugar-free dark chocolate cremeux. Those of you who aren't familiar with cremeux, it is a cross between ganache and custard.

Where is this awesome chocolate from you may ask? It is from Pascha. I used their unsweetened dark chocolate chips. The sugar replacements I used for the cremeux are a mix of Allulose and Maltitol, and for the chiffon sponge I used a mix of Alchemy fibre (which is a blend of Inulin and edible gum) and Allulose. Why these choices of sugar replacements? They are all soluble in water so you don't get any grittiness from them like you would from Erythritol. While Alchemy fibre is not sugar, it adds bulk to the bake, is a good meringue stabilizer and good for diabetes management and digestive system. I thought of using it when I saw Swee Heng, a bakery chain in Singapore, use it for their sugar-free chiffon cakes. While Maltitol is a sugar replacement, it contains carbohydrates and will raise the blood sugar levels a little (but much less than sucrose), unlike Allulose and Alchemy fibre. I used a little Maltitol instead of using all Allulose because I have it lying around at home and it needs to be used up 🙈. All the sugar replacements used here taste less sweet than white sugar (sucrose) so I used more than if white sugar were used. The chocolate doesn't contain sugar at all so that needs to be compensated as well. You may adjust the amount of sugar according to taste. We don't have a sweet tooth so if you prefer sweeter tasting cakes, please add more sugar replacement.

Sugar-free dark chocolate cremeux (with yuzu option)

Ingredients:

150g heavy cream (may replace with 40g butter and 110g full fat milk)

150g full fat milk

60g egg yolks (about 3-4)

55g Allulose (45g if not adding yuzu concentrate)

20g Maltitol (15g if not using yuzu concentrate, may replace with Allulose)

Pinches of salt

140-145g sugar-free 100% cacao dark chocolate (unsweetened)

3g gelatin bloomed in 20g 100% yuzu juice concentrate (optional)

1. If adding yuzu, bloom gelatin in chilled yuzu juice concentrate. Set aside. Omit gelatin if not adding juice concentrate.

2. Whisk together egg yolks, salt and sugar replacements in a heatproof bowl. 

3. In the meantime, heat milk and cream in a saucepan until steaming hot but not boiling. Pour into egg yolk mixture in a thin stream while whisking the egg yolk mixture to temper the egg yolks. Pour everything back into the saucepan.

4. Whisk the custard and cook until 82-84C. 

5. Place chocolate and bloomed gelatin in large mixing bowl. Pour hot custard over and let it sit for 2 minutes. Use an immersion blender to blend until smooth.

6. Press cling wrap onto the cremeux and cool to room temperature before refrigerating overnight or at least 4 hours.

7. When ready to assemble with sponge, remove from fridge and let it sit at room temperature for 30 minutes. Loosen the cremeux gently with a spatula before using.

I added a little yuzu to offset the richness of the chocolate. You may use orange juice concentrate and orange zest to add some citrusy notes too.

Sugar-free chocolate chiffon sponge

Ingredients (makes one 10x12" and one 7x7" sheet cakes):

Egg yolk batter

4 egg yolks

10g Allulose

20g sugar-free 100% cacao dark chocolate (unsweetened)

45g vegetable oil

45g boiling hot water 

10g cocoa powder (I used Valrhona)

65g cake flour

½ tsp baking powder

Pinch of salt

1.5 tsp vanilla extract 

Meringue

4 egg whites

30g Alchemy fibre

70g Allulose

¼ tsp cream of tartar 

1. Line the trays with Teflon sheets or parchment paper. Preheat oven to 170C. 

2. In a heatproof or microwave safe bowl, bloom cocoa powder by whisking in boiling hot water. Let it sit for 1 minute. Add unsweetened chocolate and stir until melted and smooth. Microwave or double boil if necessary if the chocolate is not fully melted. Set aside.

3. Prepare egg yolk batter. Whisk together egg yolks, salt and Allulose until thick and pale. Add oil and whisk until combined. Add chocolate paste in 2. and whisk until well combined. Add vanilla and whisk until combined. Gradually sift in flour and baking powder and whisk until no trace of flour is seen.

4. Prepare meringue. In a small bowl, whisk together Alchemy fibre and Allulose. In a clean metal bowl, beat egg whites with cream of tartar until firm peaks, gradually add sugar-replacement mix once the egg whites are foamy. 

You should also be able to flip the bowl upside down without the meringue sliding out or flopping around.

Meringue with firm peak

5. Quickly but gently fold meringue into egg yolk batter in three additions. Divide the batter among the two trays in a ratio of approximately 5:2 by weight for larger: smaller tray.

6. Bake for 12 min or until skewer comes out clean. Immediately flip the cakes out onto fresh sheet of parchment paper and roll up the larger cake to cool. Note that each oven is different so adjust temperature and time accordingly.

Freshly baked 10x12" sheet cake

When you are ready to assemble, unroll the large sheet cake and pipe a generous amount of cremeux in the middle of the sponge. Use a small spatula to smooth out the cremeux as necessary. Roll it into a tight roll, cutting off the excess strip of sponge if necessary if you are making Rilakkuma's face for each slice of cake. Refrigerate for 2 hours.

In the meantime, you may cut out Rilakkuma's ears from the smaller sheet cake using 2-2.5cm round cookie cutters. Cut off a little cake along the circumference with the same cutter so the ears can sit nicely on the head. Keep the small cake cutouts in a container or covered until ready to assemble.

I used white strawberries for Rilakkuma's snout as it is in season now. You may use other fruits like banana if you wish but dip it in lemon juice to prevent oxidation. I used mango for Rilakkuma's inner ears. I used a smaller round cutter or you may use jumbo straw to cut it out. Leave the cut pieces of fruit on paper towel in the fridge to remove excess water.

When it is time to assemble, you may melt a little chocolate with charcoal powder (or use black chocolate) and added on the eyes, nose and mouth of a cut slice of swiss roll. Cut slices of swiss roll with a serrated knife and arrange the ears and facial features on the serving plate. 

Serve with extra fruits (highly recommended) as this is a very rich cake that serious chocoholics can appreciate. And by serious chocoholics I mean those who appreciate cacao without too much added sugar to offset the natural bitterness. My hubby is one such person and he's the type that likes his eating chocolate, chocolate drink and chocolate bakes with a touch of bitterness from the cacao. Needless to say, hubby gave a thumbs up for the cake! Best eaten chilled when the cremeux is firmer.

with love,

Phay Shing