GadgetGuy
(Formerly Shermie)
The burner that you are using must be set to a the lowest setting to keep scorching & burning at bay. This could take a while for the custard to thicken.
Using a double boiler lets you raise the setting on the burner a little higher. This way, the custard is away from direct heat from the burner & the boiling water is cooking the contents in the upper pot or bowl.
Using a double boiler lets you raise the setting on the burner a little higher. This way, the custard is away from direct heat from the burner & the boiling water is cooking the contents in the upper pot or bowl.