Black trumpets are popular edible mushrooms. They have a rich, smoky flavor that is far better experienced than described.
Their deep flavor works well in many recipes. They're a great addition to soups, sauces, pasta dishes, seafood recipes, or meals with any sort of meat. Basically anything without a lot of other strong tasting ingredients that will overshadow your delicious trumpets!
The dried mushrooms can then be chopped or powdered, and used to add flavor to recipes or white wines.
Add your dried mushroom powder to rice dishes, or even couscous. Use it to make flavored butter. Once you start thinking about it as a spice you'll love how it can be used to flavor so many meals!