NEW YORK (AP) — Amazon has begun selling ready-to-cook meal packages for busy households in a bid to expand its groceries business.

Amazon-branded meal kits come with raw ingredients needed to prepare such meals as chicken tikka masala and falafel patties. They can help households save time; a kit for salmon with soba noodles can be prepared in just a half-hour, for instance. But at $16 to $20 for two servings, they can be more expensive than buying ingredients separately in larger quantities.

The development comes as Amazon is also buying the organic grocer Whole Foods for $13.7 billion, a de...