Here's the recipe that I use (I just posted it in the Recipes section, but I'm not sure how long it will take to show up there):
18 oz. creamy peanut butter
1 lb. (3 cups) powdered sugar
1/4 lb. (1 stick) unsalted butter (room temperature)
12 oz. chocolate chips
1 cube (1" x 1") paraffin (optional --- may substitute 1 tbsp. shortening)
Blend together the first 3 ingredients. Roll into chestnut-sized balls. Insert a toothpick into the center of each ball. Freeze for at least one hour.
In a double boiler, melt chocolate chips and paraffin (or shortening). Dip balls quickly into chocolate mixture, coating about 3/4 of each ball. Put on wax paper. Remove toothpicks and smooth out the hole (left from the toothpick) with your finger. Let the balls set up on the wax paper until the chocolate has hardened.
They are easy to make and so yummy!