Double Umami Mushroom Soup

Name: Double Umami Mushroom Soup
Cuisine: Asian
Ingredients: 2 tablespoons unsalted butter; ½ cup chopped shallots; 2 teaspoons minced garlic; 8 ounces cremini mushrooms, sliced; 8 ounces shiitake mushrooms, stems removed; ¼ cup all-purpose flour; 3 cups vegetable broth; 2 teaspoons fresh thyme leaves; 1 dried bay leaf; 2 tbsp Gochujang; Salt and pepper to taste; 1 cup heavy cream; 2 tbsp soy sauce; 2 tbsp mirin