I would like to thin canned frosting so I can pour it over a bundt cake. Any suggestions and will it harden after setting?
You will be better off microwaving it at 15 second intervals. Stir between intervals until it is soft. Pour over the cake and it will harden as it cools.
Either do as Judy suggested or thin with water. Just don't thin with milk as it will have to be refrigerated then.
Place the frosting in an electric mixer bowl mixing the frosting until smooth, gradually add evaporated milk until you reach the consistency you desire to glaze your cake. If the glaze is still too thick after mixing, microwave on 50% power at 15 second intervals until the right consistency is achieved.
You can also thin it by utilizing the bain-marie method www.thekitchn.com/
this method allows you to slowly cool it down while you whip it to a desired consistency