I have a model of ice cream that I want to melt upon pressing a button. Something like this is what I’m looking for, but without it falling over:
Any ideas to point me in the right direction? Thanks in advance! 
I would be thinking about a series of morph targets, I don’t know what modeling package you are using so its difficult for me to advise on how you’d create the morphs, but once you have done that, morphs can easily be controlled with blueprints.
If you create the simulation in another program like houdini, you can export in alembic and use the animated mesh in UE4 too. Idk what’s better between that and morph but it give you another option 