I found this recipe on allrecipes.com when searching for a bon-bon recipe. However, I had a hard time forming the little balls and dipping them in chocolate with destroying them. I was much more successful pressing the mixture into a bar pan and pouring the melted chocolate on top.
2 cups peanut butter
3/4 cup butter
4 1/2 cups powdered sugar
3 cups Rice Krispies
6 squares of semisweet chocolate (6 oz)
Melt together peanut butter and butter, stirring occasionally until warm and smooth.
In a large bowl mix together powdered sugar and cereal. Pour the peanut butter mixture over the cereal mixture and use your hands to blend well.
Press into bar pan and allow to cool while melting the chocolate.
Melt chocolate on low heat until smooth; pour over peanut butter mixture in the pan.