Can't you blend anything you want? If it's too thick just add water.

You can use palm or coconut fat as a butter replacement and blended soaked nuts as a cream replacement. It might not taste the same, but it's edible at least.

A good one which I personally started out with as a base is a large handful or two of spinach leaves and a ripe banana blended with some water. From there on you can make a pretty creamy and healthy smoothie, just add almonds, dates, berries, etc. to create variants.

Just use the search term "blended" and "vegan" and you'll find a ton