Porcini mushrooms: quantity needed for 5-gal batch?

Beer Recipes
1

Would like to try flavoring a 5-gal batch of porter or stout with porcini mushrooms if only a small quantity is needed.  They are pricey, and I wouldn’t want to buy more than a couple of ounces in case I don’t like the results.

However, I don’t have any idea how much would be required to make a flavor impact.  If anyone has experience with them, I’d appreciate any hints or feedback regarding quantities and techniques.

Thanks in advance.

2

Not sure if you already saw this:

3

I’m sure Denny will tell you if he sees your post. Otherwise, I think a search will find his Wee Shroomy recipe.

4

Assuming fresh, not dried, minimum of 3 lb. for a subtle flavor and 5 lb. for a more pronounced flavor.  See the article mentioned above for tips on how to process them.