Does green tea ice cream have caffeine?
Check the ingredients. If it's made with tea as an ingredient,
it does! I happen to know that Haagen-Dazs' green tea ice cream is
made using real green tea, and therefore it does contain caffiene.
Some brands might use artificial flavors instead of real tea, and
those brands will not have caffeine.
My guess would be that it contains more caffeine per unit of
volume than actual green tea (though green tea has less caffeine
than black tea), but this is mere speculation.