Adventist Teaching: Yes
Biblical teaching: No
Ellen G. White explicitly taught that tea and coffee drinking are sinful and should be abstained from entirely. Because the Adventist Church upholds her writings as equally as inspired with the Bible and that they speak with “prophetic authority”, they are stuck having to defend and uphold this (even though millions of SDAs do not).
This is not true, nor does the bible forbid either of them. Any food can be sinful in so much as food can become an idol in anyone’s life. But that doesn’t make the food itself inherently sinful—it means over indulgence, addiction, and idolatry are.