I use Rapadura so my 'icing sugar' is very brown - I just make chocolate or caramel icings - disguises the colour and you don't need yukky food colouring... and tastes good too!
But our favourite icing is just chocolate hazelnut spread (I make mine dairy free with Rapadura:
http://quirkycooking.blogspot.com/2009/10/chocolate-hazelnut-spread-dairy-free.html). Just spread it onto the hot cake, and it melts and drizzles down the sides, then sets as it cools. Yum!
Or I make this chocolate/carob icing which has no sugar, just honey (sorry, keep forgetting to write down grams for this recipe):
Combine all ingredients in Thermomix - 2 mins, 60 degrees, speed 2:
- 3 Tablespoons coconut oil or butter
- 1/2 cup carob chips or chocolate chips
- 1/4 cup honey (or rice malt syrup)
- 1/4 cup rice-almond milk
- 1 tsp vanilla extract
Drizzle and spread over cake - it will get firm as it cools.
Of course, this won't help much if you're looking for coloured icing!