Slowly, add powdered sugar. When the powdered sugar gets to be too much for the mixer, mix by hand.
Crush the Rice Krispies.
Add Rice Krispies to the mixture by hand.
Roll peanut butter into balls by hand.
Carefully, melt the chocolate in the microwave. Check every 20 seconds and stir.
Pop two to four peanut butter balls into the melted chocolate bowl and roll them around with a spoon. When you pick them up with the spoon, allow the excess chocolate to drip off. Then, carefully spoon them out onto a cookie sheet covered in wax paper. Swirl the chocolate on top of the peanut butter ball.