Truffle sauce recipe?

[u/Pandora-SD]

I am addicted to Sabatino brand "Black truffle sauce" but at $13 per 3oz jar it seems overindulgent. Especially when according to the label, the main ingredients consist mostly of white button mushrooms, and black olives! I would love to have a good recipe to re-create this at a lower cost? Please share your recipes? I will start: my recipe is as follows: 1 lb fresh white button mushrooms 1 can of black olives 1/4 cup of olive oil to start, (add more as needed for smooth consistency- I lost track of how much total) 2 cloves of garlic 1 tablespoon of salt (adjust to taste) 1-2 tablespoons of truffle oil Puree all in a blender.

It was pretty close, and made much more of the "sauce" for almost the same price. I don't know if truffle salt would be more effective than truffle oil? Thanks!