I have been doing a bit more research on conkers.
Everything I have come across warns you not to ingest them as they have a poison in that will make you at best very ill and can kill .
Please do not experiment with eating them in any way. Soaking them in water and using instead of washing powder is a much better and safer use of them.
Seriously,
Would you eat something you wash your clothes with?
I am useless at posting links but I've just watched a video of a lady who grinds them she'll and all into a powder, then dries the crumbs in a dehydrator (oven works too) storing the dried nuts in a tin with a small muslin bag of rice and then adds some tea tree and lavander oils to make it smell nice. Then when she wants to wash clothes she soaks the dried nuts in water for a few hours to make a washing liquid after straining the mixture, and uses it in her washing machine.
I'm going to try this as it will save a fortune on washing liquid.
I've also watched a video on making hand soap with it.
Please don't eat conkers!
Sweet chestnuts on the other hand are delicious and can be safely eaten.
Don't get confused with these two nuts. It's easily done. They are very similar to look at, and all it takes is someone to miss identify and swear they are eating conkers when in fact they are eating sweet chestnuts. I've seen this myself not so long ago when out with someone we found conkers and my companion got very excited thinking we had found chestnuts.
Use conkers for soap... not putting in alcohol or making biscuits from them!