To say "What are you doing?" in Malayalam, you can use the following phrases:

• നിങ്ങൾ എന്തുചെയ്യുകയാണ്? (niṅṅaḷ entuceyyukayāṇ?)
• എന്തു ചെയ്യുന്നു? (enthu cheyyunnu?)
• നീ എന്തുചെയ്യുന്നു? (nī enthu cheyyunnunnu?)

All of these phrases are informal and can be used to ask someone what they are doing. Additionally, to say "What are you doing now?" in Malayalam, you can use the phrase "ഇപ്പോൾ നീ എന്തുചെയ്യുന്നു?" (ippōl nī enthu cheyyunnunnu?) .