Planned Joy Eat

I had my first planned joy eat and let myself have a small piece of cake, but it just made me want more. How do I get past wanting more sugar. It has been over 6 weeks without sugar. I was hoping it wouldn’t taste so good. How do I get past wanting sweets once and for all. I’m sure if I had totally binged on it. I would feel bad but one small piece left me wanting more.