Vegetarian Mushroom Gravy

Ingredients (11)

• + 5 tablespoons unsalted butter, divided add to pantry
• + 3 tablespoons shallot, minced add to pantry
• + 12 ounces baby bella mushrooms, sliced add to pantry
• ✓ 2 cloves garlic, minced
• + ½ teaspoon salt add to pantry
• + ½ teaspoon ground black pepper add to pantry
• + ⅓ cup sherry add to pantry
• + ¼ cup all-purpose flour add to pantry
• ✓ 3 cups vegetable broth (such as Kitchen Basics®)
• + 1 ½ teaspoons dried tarragon add to pantry
• + 3 teaspoons low-sodium soy sauce add to pantry