I must be unique....I have never in my life managed to eat a full mars bar, let alone one battered and fried
Chocolate is a pleasure, in small pieces.
I'm in the notion for Barney Rubble's Jamaican ginger cake and custard for pudding tonight though
There's an issue that is often overlooked in the calorific claims.
Those calories are obtained by setting fire to the foodstuff and recording the heat obtained....now we're not dragons, and our guts really are most suitable for cooked foods. So, while nuts are high calorie, unless they're processed, we don't obtain maximum value from them. Similarly stuff like wholegrain whatever. Our guts 'process' that and end up feeding the bacteria and emiting the remains as 'roughage'.
Sugar, and fats, though, we're awfully good at making pretty good use of those
Butter, or oil, or fat, and sugar, add in stodge of some kind, rice, wheat, oats, potatoes, corn, beans, legumes......and you're sorted.
Muesli bars are pretty high calorie for the weight, and they've got enough roughage that your guts won't either skitter or seize up, too.
Thing is though, being out and about, good food, tasty food, is a big part of that. Meat eaters want that taste/texture/smell to their dinner, vegetarians want variety, gluten free folks manage their own, etc., etc., and we all have different tastes.....even if we do live near Glasgow !
M