Step 1

In a LARGE skillet - melt butter once melted add soup, salt, pepper, and dry mustard - stir for one minute

Step 2

Slowly add cheddar cheese - keep stirring till completely melted - add sour cream and stir

Step 3

Slowly add milk --- keep stirring

Step 4

Once smooth - add cooked pasta ( I did it one cup at a time )

Step 5

Once completely mixed serve in a casserole dish

Step 6

Enjoy