Preheat oven to 350° F.
 
Beat the butter and sugar together. Add egg and vanilla. Add dry ingredients; flour, cocoa powder, salt, baking soda, and baking powder and mix well.
 
Roll the mixture into 1-inch balls and place on ungreased cookie sheet. Press in the center of each ball using your thumb.
 
Drain cherries and reserve the juice. Put a single cherry in the indentation of each cookie ball.
 
In a saucepan, mix together the condensed milk and chopped chocolate and heat until chocolate is melted. Stir in 4 teaspoons of reserved cherry juice.
 
Drizzle about 1 teaspoon of chocolate/cherry mixture over each cookie (try to cover the cherry, too).   You may have to add more cherry juice to make frosting spreadable.
 
Bake for 10 minutes.