How do you turn off cravings?

An option some people here have used that you didn't mention: Schedule the craved food for a future time, later in the week maybe. (Maybe cut a few extra calories in the days between to budget for a bit extra eating that day.) If you still crave it then, eat a moderate portion.

I usually did something like that, or simply got a very small amount of the craved thing, ate it, and fit it in. Usually the first few mouthfuls of the thing are the most satisfying anyway. (I get that the minimum order of KFC is still fairly caloric. Throwing away food is not an ideal thing for various reasons, but in my case I figure pasting inches on my hips isn't great, either, so sometimes I eat only part of a thing.)

About powerlessness: You know without anyone telling you that in reality you have complete control over what you put in your mouth, chew, and swallow. Yes, it can be hard to exercise that control.

We feel powerful when we successfully use the powers we have. Someone here once compared changing one's eating habits to training a puppy: The more frequently a person gives in to the puppy and doesn't require them to do what's desired, the worse-trained and more pester-y that puppy is going to be. Consistency in requiring the desired behavior eventually breaks the cycle. In other words, ignoring a craving gets easier every time a person does it: It's a skill we practice.

I'm not a fan of permanent complete self-denial of treat foods. I think it's important to manage the frequency and portion sizes. Figuring out how to do that is hard, but it is somewhat like that puppy-training scenario: We need to make a plan of what we're going to do, and stick with it.

My suggestion, if sticking with it doesn't work, is to re-analyze the plan: What were the triggers that made things go sideways? (Social situation, habit, boredom, emotions, etc.) What other ways could the trigger situation be handled - non-food ways, ideally. Spend only a few minutes thinking of a new plan to handle that trigger more usefully next time it occurs. Rehearse the plan vividly in your head a few times, like a mini-movie. Then next time the situation arises, put the new plan into action with as little self-questioning as possible, treating it as a decision that's already been made.

Best wishes!

KFC was my one craving I couldn't satisfy any other way. My very wise dietitian told me to schedule a "cheat-treat" meal once a week. My choice KFC or something else. Not both. She reminded me that I had worked hard all week cutting calories, and it would be very easy to undo the whole week in one meal if I wasn't careful. She looked at the nutritional numbers KFC provided with me. We experimented with different combos to find a happy medium that came close to fitting my nutritional goals and mostly satisfied my cravings.
It was really hard for 2-3 weeks. But my attitude changed. For instance I didn't mind not getting to have fried okra this week because I knew if I still craved it next week I could have it. I'd just have to sacrifice something else, and this week I chose mashed potatoes and corn. It got much easier, and I could apply it to different things.

Same here..health, plus the way it's cooked and I am sort of disgusted with the mass production of chicken and beef. & if that wasn't enough, the fast food I used to crave like Wendy's cheeseburgers tasted like cardboard or like they mixed water with the beef the last few times I went there. Fast food is generally way overpriced, in my opinion, for the decreasing quality/taste of foods.

Eat an entire head of cauliflower.

Thats an extreme approach, but the method is to get really full on calorie-sparse foods that arent engineered to have extreme-delicious flavor