The necessary ingredients are dark chocolate, butter, sugar, eggs, flour, baking powder, salt, ripe bananas, liquid caramel, and crushed nuts (optional).

Yes, you can use milk chocolate or white chocolate according to your preferences. This will give a different flavor to the cake.

In the Thermomix, melt the chocolate with butter, then add sugar, eggs, flour, baking powder, and salt. Mix until you get a homogeneous batter.

Yes, it is recommended to mash the bananas with a fork before incorporating them into the batter for even distribution and a more pronounced flavor.

Yes, you can add crushed nuts or sliced almonds to the batter to bring a crunchy texture and additional flavor.

Generally, the cake should bake in a preheated oven at 180°C for about 30 to 35 minutes, or until golden and cooked through.

You can make your own caramel by melting sugar in a saucepan until it reaches an amber color, or use store-bought liquid caramel for convenience.

Pour half of the batter into the mold, then pour the liquid caramel over the batter. Then add the remaining batter and lightly swirl to create a marbled effect.

Yes, you can add a pinch of cinnamon or a teaspoon of vanilla extract to the batter to bring an additional aromatic note.

You can store the cake in an airtight container at room temperature for 2 to 3 days. If desired, you can also refrigerate it for longer preservation.