01 -
Melt butter over medium heat. Add flour, salt, pepper, thyme, and cayenne. Whisk until combined.
02 -
Cook the flour and butter mixture for 1-2 minutes to remove raw flour taste.
03 -
Gradually pour in milk, about 1/2 cup at a time, whisking constantly to prevent lumps.
04 -
Bring to a vigorous simmer, whisking frequently. Cook for 3-5 minutes until smooth and creamy. Add milk or water if too thick.