who wrote mariah carey all i want for christmas

That would be Walter Afanasieff and Mariah Carey herself. Walter Afanasieff is a renowned songwriter and record producer who has worked with many famous artists, including Whitney Houston, Celine Dion, and Michael Jackson. Mariah Carey is an iconic singer and songwriter who has achieved worldwide success with her unique vocals and catchy pop hits. The song "All I Want for Christmas" is one of Mariah's most popular holiday hits, and it was written by Walter and Mariah together. It's a classic Christmas song that captures the spirit of the season with its catchy melody, playful lyrics, and memorable chorus.