Melt butter over medium high heat in a medium sized saucepan.
Whisk the flour and garlic powder (if using) into the butter until incorporated and smooth.
Slowly whisk in the milk and cook, stirring frequently, over medium high heat until the mixture has thickened, about 6 minutes. Season with salt and pepper.
Add the peas and cook, stirring frequently, until the peas are heated through, about 4 minutes.
Stir in heavy cream and check for seasonings.
Garnish with additional pepper, butter, fresh chopped chives or dill. Serve and enjoy!