Step 1

Melt butter in a skillet over medium-high heat. Add mushrooms and cook until tender, about 3 minutes. Add garlic and cook until fragrant, about 30 seconds.

Step 2

Sprinkle flour over the mixture and stir to create a smooth paste. Slowly add half-and-half and continue to stir to prevent any lumps. Add soy sauce, salt, and pepper; stir to combine. Taste and adjust seasoning to your liking.