Mornay Sauce

INGREDIENTS

1 cup

whole milk ((245 grams))

2 tbsp

all-purpose flour ((15.6 grams))

1 tbsp

unsalted butter ((14 grams))

1/4 tsp

salt ((1.4 grams) or to taste)

1/8 tsp

freshly ground pepper ((.29 grams))

1/4 cup

finely grated parmesan ((30 grams) or more to taste, room temperature)