On medium high heat place the butter in sauce pan and melt.
Add flour and cook for few minutes. Do not brown.
Add soup mix to coat.
Mix in hot milk and bring to a low boil. Cook for aprox. 10-15 min, (stirring as to not get any lumps and doesn't stick to the bottom of the pot), or until you feel the noddles are cooked and sauce is thickened. If it gets to thick, add a bit more milk.