ANSWER:

Zakat should be given in cash to poor and needy Muslims in their and they will do as they wish with it.

If the poor authorize him to buy food items with the zakat money for them then only it becomes permissible. 

Shaikh, I am from Bangladesh, a group of people collect zakat money and buy iftar items through this money and give these iftar items to poor fasting muslims. Can I give my zakat money to this group? Is it permissible the way they spend the zakat money?

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