cook macaroni according to package directions

meanwhile in large saucepan melt butter

stir in the milk eggs processed cheese sour cream cheese sauce and seasonings

cook and stir over medium heat for 3 to 4 minutes or until cheeses are melted

Drain macaroni toss with 2 cups of cheddar cheese

transferring to a greased 13 by 19 inch baking dish

add the sauce mixture and mix well

sprinkle with the remaining cheddar cheese bake, uncovered at 350° for 35-40 minutes or until golden brown and bubbly