<human>: I'd like to know how to make a sour cream sauce for a chicken dish.
<bot>: To make a sour cream sauce for a chicken dish, start by melting 1/2 cup of butter in a saucepan over medium-high heat. Once the butter has melted, add 3 tablespoons of all-purpose flour and whisk together until the mixture is smooth and bubbly. Slowly stir in 2 cups of milk, stirring continuously until the mixture thickens. Next, stir in 1 teaspoon of white wine vinegar or lemon juice, then season with salt, pepper, garlic powder, onion powder, and any other desired herbs and spices. Finally, stir in 1/4 cup of sour cream and cook until the sauce thickens. Serve your chicken dish with the sour cream sauce on top. Enjoy!