Description:

I'd second this opinion. I made a cranberry ale with 1.2 kg (2x600 g) frozen cranberries that turned out well IMHO. Nice subtle cranberry flavor/tartness. The ingredients were (if memory serves since the brewbook isn't handy).

Ingredients:

• 3 kg liquid pale malt extract
• 1 kg honey
• 1.5 oz Hallertauer (~4% AAU) boiling hops (60 min)
• 0.5 oz Hallertauer flavoring hops (5 min)
• 1.2 kg crushed frozen cranberries (steeped 10 min)
• Wyeast German Ale #1007

Procedure:

Source: Neil Dryden