Flourless Banana Roll Cake (Lower Sugar & Lower Carb Swiss Roll Recipe)
If you have leftover, ripe bananas on your kitchen counter you’ll definitely want to try making this light and fluffy flourless banana roll cake! This indulgent Swiss roll recipe only requires eggs, sugar, heavy cream, cornstarch, walnuts and mashed ripe bananas. It’s the ideal delight for those craving a scrumptious, lower-carb, gluten-free cake option without sacrificing flavor, and it’s such an elegant dessert, too!
Ingredients
For the Cake:
- 5 large egg whites room temperature, (190g)
- ¼ cup light brown sugar (50g)
- ½ tsp cream of tartar (this is an optional ingredient. read note*)
- 5 large egg yolks (73g)
- 2 Tbsp light brown sugar (25g)
- ⅓ cup heavy cream heated in the microwave for 40 seconds (75g)
- ⅓ cup cornstarch sifted (43g)
- ¾ cup mashed bananas (160g), from fully ripe banana (about 1 ½ medium)
For the Filling:
- 1 ⅔ cups heavy cream cold (397g)
- ⅓ cup monk fruit sweetener , or other granulated sugar of choice **
- ¾ cup chopped walnuts , optional
- 1 tsp vanilla extract , optional, for flavor
Instructions
Preheat the Oven:
- Preheat your oven to 340°F (170°C). Line a 13x18-inch (33x46 cm) sheet pan with parchment paper. Make sure the parchment paper extends slightly over the edges.
Prepare the Meringue:
- In the bowl of a stand mixer, add the room temperature egg whites. Add cream of tartar.
- Using the whisk attachment, start whipping the egg whites at low speed, gradually increasing to high as they become frothy.
- While whipping, gradually add the ¼ cup of sugar, until stiff peaks form. This should take a few minutes. The meringue should be glossy and hold its shape.
Prepare the Egg Yolk Mixture:
- In a separate 5 quart mixing bowl, add the egg yolks and the remaining 2 tablespoons of sugar.
- Using a hand blender, whip the egg yolks and sugar together until they become pale and slightly thickened. This usually takes a few minutes of blending.
- In a microwave safe bowl, heat the heavy cream in the microwave for 40 seconds until it only just starts to boil.
- Stirring constantly, pour the hot cream into the egg yolk mixture a little at a time. Be sure to stir constantly to ensure that the hot cream does not cook the eggs.
- Sift the cornstarch over the egg yolk mixture and use the hand blender to blend it in until well combined.
- Mix in the mashed bananas
Combine the Meringue and Egg Yolk Mixture:
- Gently fold the whipped egg yolk mixture into the meringue using a wide spatula. Be gentle to maintain the airiness and not deflate the batter.
Bake the Cake:
- Pour the cake batter onto the prepared baking sheet. Use a spatula to spread it evenly into the corners.
- Bake in the preheated oven for about 17-20 minutes, or until the cake is set and lightly golden on top. Allow the cake to cool completely.
Prepare the Filling:
- In a clean 3 quart mixing bowl, combine the heavy cream and monk fruit sweetener (or sugar of choice). Add vanilla extract for flavor.
- Adjust the sugar quantity for the cream filling according to your preference for sweetness (read notes**). Start with ¼ cup and taste, then add more if needed.
- Whip the cream until it reaches stiff peaks. Set aside.
Flip the Cake:
- Line another sheet pan or large cutting board lined with parchment paper.
- Place the second pan upside down on top of the cake, then flip both pans together.
- Carefully remove the original parchment paper from the cake.
Assemble the Cake:
- Spread a generous layer of the sweetened whipped cream evenly over the entire surface of the cake.
- Sprinkle on the chopped walnuts
- Carefully roll the cake into a cylinder shape
- TIP: use the parchment to help roll into a tight cylinder
- Refrigerate the cake for at least an hour before serving to allow the flavors to meld.
- Slice, serve, and enjoy! Recipe yields approximately 10-12 servings.
- Decorate with whip cream and sliced bananas (or candied bananas)
How to Store:
- The cake should be stored in the refrigerator. Wrap it tightly in plastic wrap or place it in an airtight container to prevent moisture loss and absorption of odors from the fridge.
- For longer storage, wrap the cake in several layers of plastic wrap or aluminum foil to prevent freezer burn. You can also cut it into individual slices before wrapping. Place the wrapped cake in a resealable freezer bag or an airtight container. When ready to eat, thaw the cake in the refrigerator overnight.
- Always store any fillings or toppings separately, especially if they contain dairy or fresh fruit, and apply them just before serving or after thawing the cake.
Notes
*adding the cream of tartar is optional, but adding it helps to promote fluffier whipped egg whites and also helps to achieve and maintain stiff peaks.
**For the whipped cream filling, you can use any sugar-free substitutes such as granulated monk fruit sweetener or stevia powder, but please DO NOT use sugar-free substitutes in the cake batter since the cake may not rise properly.
Nutrition
Calories: 264kcalCarbohydrates: 20gProtein: 5gFat: 21gSaturated Fat: 10gPolyunsaturated Fat: 4gMonounsaturated Fat: 5gCholesterol: 121mgSodium: 39mgPotassium: 180mgFiber: 1gSugar: 10gVitamin A: 696IUVitamin C: 2mgVitamin D: 1µgCalcium: 50mgIron: 1mgZinc: 1mg***Net Carbs: 19g
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