First, you need to put the candy melts in the right size of cup. For these tall cookies, the best container would be tall and narrow so that it is easier to dip the cookies halfway. Properly melting candy melts can be tricky- it is so easy to burn and hard to get the right consistency. Here are a few tricks to help it turn out just right.
Heat the candy melts in the microwave for 45 seconds on medium heat (three times).
Carefully take cup out (careful, it may be hot!) and stir melty mixture with a spoon between heatings.
If the melted chocolate is too thick, DO NOT ADD WATER. Add a tablespoon of shortening instead!
As you dip the cookie, make sure that you are evenly coating the chocolate on each side. You may need to tilt and twist the cookie to different angles to make sure you get the cookie covered the way you want. As you can see, I dipped my cookie in about half way. To achieve this, I had to tip the cup a little bit. Play around with the different angles to find what works for you!
After you have dipped your cookies, lay them on parchment paper or foil to cool and dry. Before the cookies dry completely, pour your choice of sprinkles on the melted chocolate. (You have just a few minutes before the melted candy will get too hard and the sprinkles won't stick anymore.) Sprinkle away to your heart's content!