Cook and drain macaroni and place in a 2 1/2 quart casserole dish.
3
Melt butter over medium heat in a large saucepan; stir in flour and mix well. Add milk and cook over medium heat, stirring constantly until sauce thickens. This part takes some time - be ready to stand at the stove for a bit - it''s worth the effort!! Add salt, sugar, and processed cheese; mix well.
4
Mix sour cream and cottage cheese into sauce and pour over macaroni; mix well.
5
Sprinkle grated cheddar over top. Dot with butter and sprinkle with paprika. May be frozen at this point.