While the wild rice is cooking prepare the remaining ingredients. Place the dried porcini mushrooms in a 2-cup heat-proof measuring cup. Carefully pour 1 ½ cups boiling water over the mushrooms, stir and set aside to soften, about 15 minutes. Remove the porcini from the hot water using a slotted spoon, reserving the soaking liquid. Chop the porcini and set aside.
In a large soup pot or light colored Dutch oven, melt 1 tablespoon butter and 2 tablespoons olive oil over medium-high heat. Add the sliced fresh mushrooms (not porcini) and stir to coat. Distribute the mushrooms to cover the bottom of the pot. (not all mushrooms will be touching the bottom.) Cook the mushrooms, undisturbed, until their moisture is released and then evaporates, and turn a deep golden brown, about 8 to 10 minutes. Stir and continue cooking until crusty bits start to form on the bottom of the pot.
Add the shallots, minced garlic and tomato paste to the mushrooms. Cook stirring constantly until the garlic is fragrant and the shallots start to soften, about 2 minutes.
Stir the chopped porcini to the soup pot. Sprinkle the flour over the cooking vegetables. Cook, stirring constantly, until the flour sticks to the bottom of the pot and turns golden brown. This fond is essential to building flavor. Slowly add the wine and deglaze the pot, scraping up any browned bits. Add the vegetable broth and reserved porcini liquid pouring slowly so you leave any grit behind. Discard the dirt and grit. Bring the soup to a boil. Reduce the heat to medium-low to maintain a steady simmer. Cook for 15 minutes.
Add the cooked wild rice to the soup and cook for 10 minutes. Remove from the heat and add the cream and soy sauce. Stir until combined. Serve immediately with a dollop of parsley butter on each bowl, if using.