** Flooding tip **
When flooding cookies I use Wilton bottles (shown below). I always cut the tips a little more to help the icing flow better. I got mine at Michaels but I have also seen them at walmart, as well as, online (amazon). They are super cheap!
To get the polka dot look I start by flooding my cookie like normal. (See below).
Then I immediately take the other color (white) and squirt small droplets into the icing. At first it was hard to get the dots the same size but it started to get easier after a little practice. :) After letting the icing dry for a couple of hours, I used black royal icing to pipe on the monogram.
Hope they are tasty, Sarah!