My comments

you can use vanilla essence as well - 1-2 tsp.

you could use any kind of jam - it would be perfect with blueberry jam. As for the tray, a cake tin with a diameter of 26 cm would be enough.

100 ml would be enough

1 tablespoon baking powder is exactly 10 gram. Vanilla sugar, not vanilla, is added for aroma. You can add only essence or powder, or skip it.

Hello, we have fixed all measurements in exact values. Sorry for the misunderstanding.

It is 1 tbsp or 10 gram.

it is a round baking tray.

yes, it is corn starch

it is 3 bananas!

yes, you can but with lower fat %. It should be more liquid

Hello, it is 10 gram or 1 full tbsp.

Hello, bake the cake at 360°F (180°C) for 35 - 40 min.

100 gram

liquid cream for cooking

10 g or exact 1 tbsp.

it stands for pieces

Put them to stew in butter (1 - 1.5 tbsp) or in oil. After that pour little water.

You don't work with 5 different cake rings, you just bake 5 different cake layers after each other.