Preheat oven to 180°C bake. Line a 20cm cake tin with baking paper.
In a large bowl, whisk together eggs, oil, milk and vinegar. Grate carrots and add to bowl along with Carrot Cake Mix. Gently fold to combine.
Transfer to prepared tin and bake for 65-75 minutes, until the cake bounces back when you touch the surface.
Place icing ingredients in a large bowl or bowl of your stand mixer and beat for about 8 minutes, until super smooth and fluffy.
Wait until cake has completely cooled before icing, or the icing will melt. Dollop icing onto cake and use the back of a spoon to spread in lovely swoops.