Preheat oven to 175°C (do not use fan bake). Bring a pot of unsalted water to the boil.
Peel and dice carrots 3cm. Add carrots to pot of boiling water and cook for 20-25 minutes, or until soft. Drain carrots, rinse under cold water and allow to cool completely to room temperature. Place carrots in a blender with butter, vanilla extract, and eggs. Blend for 2-3 minutes, until smooth. Transfer to a bowl and gently fold in carrot souffle mix.
Pour mixture into 4-6 separate ramekins or a baking dish. Bake for 30 minutes, until souffles are golden brown and bounce back when touched.
Sprinkle souffles with icing sugar. Serve warm with whipped cream on the side.