Using a standing mixer, mix together the egg whites, powder sugar, vanilla and cream of tarter until combined
If your royal icing mixture looks like a yellow soup, add in another cup of powder sugar (max 2 cups) until your icing starts to thicken
Continue to mix until white and stiff with peaks. About 5-7 minutes
Scoop some icing into a bowl and add in your pink food coloring and mix until combined
Scoop the pink icing into a piping bag and place into the fridge to use later
Scoop some white icing into the piping bag
Using the remaining white icing, add in 2-4 TBSP water into the white icing and mix until combined
Pour into a squeeze bottle
Using the white icing in the piping bag, pipe a line around the edging off all your cookies. Place white icing in the piping bag into the fridge to use later
Using the squeeze bottle, fill in your cookies
Let completely dry overnight
Once dry, using the white piping bag, add a small dollop of icing onto the back of the egg cookies to act as a glue. These are going to be your bunny feet.
Place two bunny feet on each circle cookie.
Using the pink icing, add the details to the feet and pipe on a pink dot for the bunny tail.
Let completely dry for an hour to two hours before enjoying!