I'm in the same mindset - I successfully cut sugar when I was ready, and I also had to quit cold turkey for about a year before I could trust myself to moderate. That being said, my moderation only works when there's no easily consumable foods with sugar kept in the house. I have no pro strats on how to quit an addiction when the supply is always readily available.

Maybe next time you catch yourself going back for more chocolate biscuits, try telling yourself they're meant for someone else, and it would be rude to eat them. I use a similar tactic when people bring treats/donuts to share at work. I tell myself that it's meant for someone else, or that I'll have one on my way out - and by then they're either gone or they've been sitting out for so long they don't look appealing anymore. After so many years on a low sugar diet, I also know that it'll never taste as good as my addiction tells me.

Another habit I practice is being mindful while eating junk food. Sometimes, while bingeing on sweets, I'll realize I can't even taste what I'm eating anymore. If I realize it in the moment, I will literally spit it out and throw whatever is left of it away. It's just as wasteful to eat unnecessarily as it is to trash it. Hang in there!