How is Mesnier's dry cake made?

1 cake, 5g butter, 50g white (dark) chocolate.

Exercise:

1. Cut the cake at will. The thicker baking time will be longer and the thinner baking time will be shorter. I prefer a thicker one, which is more than 1cm.

2. In the oven, my temperature is 120 degrees for three hours. You have to master this yourself, just bake it until it's crisp.

3. Melt chocolate and butter in a bowl.

The baked cake is dried in chocolate sauce, then rolled around, then refrigerated, and then eaten after the chocolate sauce is solidified.