Reviews are mixed as Starbucks changes recipe for most popular drink

The reviews are in for Starbucks' new Iced Coffee Blend, which took effect this summer - but not everyone is thrilled with the change.

The recipe revamp marks the first formula change for the chain's Iced Coffee Blend - a best-seller - in the past 18 years.

The chain's iced coffees include ingredients that aim to create a drink that's 'approachable and refreshing.'

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