Ask a Vegan Baker

There is no recipe for German Chocolate Frosting here on veganbaking! I just made one based on thickening the frosting with cornstarch (instead of the original egg yolks). The texture is just wrong, like pudding. Mattie, or anyone, do you have any ideas for making a more custard-like base for the frosting? I used coconut milk and some of Mattie's vegan butter, thickened it with a slurry of cornstarch in almond milk. I'm sure it will taste fine, but I think there's a better way.
I had a vegan modification I liked, but I lost it. And I need to get it right for a party.
Thanks!!