I'm currently redoing a diet called Dr Cohen's and when you finish and refeed, then maintenance they have a set of rules and guidelines with tips etc..... BUT THEIR BIGGEST MOTTO IS
"IF YOU CANT CATCH IT OR GROW IT DONT EAT IT!
So now think about how long it actually takes you to grow wheat, grind it etc and make it into bread.... That's how often you should have bread, let alone the portion size when you do. (About 2 or 3 months in total)
The Twix however needs several ingredients to be made i.e. biscuit, sugar, chocolate, toffee... So this would take longer to make it and only 1 bar. Maybe around 3 or 4 months by the time you grew the ingredients. This is perhaps how often you should be having the Twix.
Bananas are about 110 cals depending on the size, try perhaps blueberries, pineapple, h/dew, mangoes, yoghurt instead. If you do need something sweet and carb based what about a protein bar or WW bar?
Hope I've been helpful.
Bren
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