In a large mixing bowl, combine all ingredients except rolling sugar and kisses. Use an electric mixer to blend very well.
Shape dough into balls using rounded teaspoonfuls. Roll balls in sugar; place on ungreased cookie sheet.
Bake for 10 to 12 minutes. Remove from the oven and top each cookie immediately with a kiss, pressing down firmly as cookie cracks around the edges.
If possible, place the cookie sheet in the freezer until kisses harden again. Otherwise, let sit for several hours on a wire rack, in a cool place until kisses firm up.
Notes
Rolling the peanut butter balls in red and green sugar quickly makes them into a Christmas cookie.