In a medium saucepan, whisk together the flour and sugar.
Place the saucepan over medium heat. Slowly pour the milk in the flour mixture while whisking continuously.
To make sure to have no lumps, take a rubber spatula and release any flour mixture remaining in the bottom corners of the pan. Continue whisking.
Cook the sauce while whisking, until it just comes to a simmer and thickens up.
Take the pan off of the heat. Stir in the softened butter and the vanilla un well incorporated,
Best to serve immediately over fresh waffles or pancakes. The sauce with naturally thicken when it cools down. Simply place the saucepan back on low heat and adding a splash of milk to loosen it back up.
Serve with fresh berries for a burst of color and freshness!
Video
Notes
Butter: If using salted butter, omit using the salt in the recipe.