Cook noodles to desired doneness as directed on package. Drain; cover to keep warm.
Melt 3 tablespoons of the butter in medium skillet over medium-high heat. Add bread crumbs and onion; cook 3 to 5 minutes or until onion is crisp-tender, stirring constantly.
Stir in marjoram, salt, pepper, cooked egg noodles and remaining 1 tablespoon butter. Cook until thoroughly heated, stirring frequently.