first off, this technique in fact will take only a few mins, ive tested myself and it worked gloriously.
1. go to your browser and search up ¨cookie clicker¨
2. click the link by the official people who made cookie clicker
3. now name your bakery ¨[anything] saysopensesame¨ and go to the dev tools
4. now click all achivements (make sure all the achivemnets show in info, if not just spam click the button until every achivement is in the infograph)
5. now export the game in the settings tab and import it to your steam

if youve done all the steps then simply wait until all the achivements has popped and enjoy yourself with 100%'ed cookie clicker


it would normally take EONS to 100% it but this is an not only simple, but easy and fast way to do so.
enjoy :)

but please, leave a comment, leave an up-vote, please share this to people and please if you can, give this an award. it will be appreciated! :DD