How do you cook buche?

"Buche" can refer to a few different things, so I need a little more information to help you! Could you please tell me:

* What kind of buche are you talking about? Is it a buche de noel (a traditional French Christmas log cake), a buche de printemps (a spring-inspired version of the cake), or something else entirely?

* What ingredients do you have? Do you have a specific recipe you're following?

* What kind of cooking equipment do you have? This will help me tailor the instructions.

Once I have this information, I can give you detailed instructions on how to cook buche!