You wind up with a multi-brand blend of custard powders from which you can make perfectly fine custard.
the amount in one package(envelope)of custard mix
what happens
They mix together since they are both bases.
When you mix green and blue, you get Turquiose.
you die!
You can mix powders of borax and sugar or the solutions.
For baked custard, no starch is used. The egg thickens it. For packaged custard mix such as Birds Custard, the thickener is cornflour or cornstarch and there is no egg.
you get black
you get the color green
they will separate
If you heat it up after you mix it, you will form "organosulfide" compounds.
Custard powder is primarily cornflour/cornstarch, with added colourings and flavourings. The cornflour thickens the mixture, the colourings and flavourings make it appear to be custard (but since it contains no eggs, the final product does not fulfill the exact definition of custard). Depending on whether it is a powder designed to be added to milk, or water, powdered milk or powdered cream can also be added. To make custard powder, just mix all of your chosen ingredients together. (If the colourings/flavourings are wet, they should be added in a way in which they evenly coat the cornflour, e.g in a "panning" machine, or some form of rotating drum. The cornflour mixture can be "dried" subsequently in a low temperature oven, if necessary).