Here is my favourite gingerbread recipe - there are some other cookie decoration ideas within it too
https://cookpad.com/us/recipes/350136-vickys-giant-gingerbread-men-gluten-dairy-egg-soy-nut-free
For the reindeer make a thick glaze with icing sugar and a little water - add some cocoa to colour it brown
Turn the man upsides down so the legs are at the top
Spread it into the shape shown and set a red or black sweet on the end for a nose
Set aside to dry
Make white glaze for the snowmen and spread it all over the cookie. This is great for covering cookies that got overbrowned at the edges!
I like to dust with some shimmer powder to make them a bit sparkly
Use choc chips, sugar pearls, raisins or anything you like to make the eyes, nose, mouth & buttons
Set aside to dry
Pipe some leftover white icing on to make eyes on the reindeer and use a black icing pen to do the pupils, mouth and ear outlines
Use some coloured icing or an icing pen to give scarf detail, add a hat if you like!
Let dry again and they're done!
