Complex sentence: Instant noodles are a precooked and usually dried noodle block, sold with flavoring powder and/or seasoning oil, usually in a separate packet; though in the case of cup noodles the flavoring is often loose in the cup.
Split into simpler sentences: Instant noodles are a precooked and usually dried noodle block, sold with flavoring powder and/or seasoning oil. The flavoring is usually in a separate packet, although in the case of cup noodles the flavoring is often loose in the cup.