All measurements are guessed rememberances and you should go with your gut, if it is getting too thick add more milk, if it's too strongly flavoured, add more milk, if it's too thin, blend another egg and incorporate like before.
Milk- Few tall cups, 1/3-1/2 gallon
Cocoa powder- couple big Tblsp
Chai spice- couple med tsp
Powdered sugar- couple cups, depending on how sweet you like it
Instant oatmeal-1/2 cup
Optional:add some brown sugar in addition 1/3-1/2 cup
Blend eggs in blender, then add oatmeal and blend more
Heat remaining ingredients in saucepan to a simmer
Add slowly to blending egg mixture.
Transfer back to pan and heat on med-medhigh while whisking constantly
Take care to scrape along the bottom and sides to stop a custard from forming
Heat just below simmering for 5-10 min
Transfer to heat safe container or let rest on stove, adjust for thickness and flavour
Let cool until chilled, please to enjoy.
I made mine thick and add milk to it before drinking, I can adjust the strength in case I want a sweeter or milkier glass.
Please to Enjoy