>> What is an example of something that is 4:1 ratio of carbs
>to protein, please? I'm confused!
Some chocolate soy milks are.
You can also combine different liquids and protein/carb powders to get an approximate 4-to-1 ratio. I often mix rice milk with some Nutiva hemp protein smoothie mix to get that approximate ratio. It's not hard to figure out, since both carbs and protein have 4 calories per gram.
In "The Thrive Diet and Lifestyle," Brendan Brazier has recipes for recovery puddings and snacks that hit that ration.