My mom has been on a kick since she found these cookies because she loves them. My kids do too because they're easy to make with her.
They're called Snowball Cookies. The recipe she uses can be found here: http://www.food.com/recipe/snowball-suprises-193873
She also likes to make them just as a simple butter cookie if she doesn't have kisses on hand.
Sometimes simplest tastes the best!