In a large bowl, combine the butter, sugar, peanut butter, and salt. Using a hand or stand mixer, mix the ingredients until everything is evenly combined.
Gently fold in crisp rice cereal.
Form the dough into 1 tablespoon-sized balls. Roll them until spherical and place on a sheet of wax paper.
Melt the chocolate using a double boiler or in the microwave. To use the double boiler, add one inch of water to the bottom and melt the chocolate on top. Stir often and be sure not to let any moisture in the chocolate (it will alter the consistency). If using a microwave, go in short intervals and stir often to avoid scorching the chocolate.
Individually, place the peanut butter balls in the chocolate. Roll each one around until it is totally covered. Carefully removed with a fork and place on wax paper to cool.
When all the truffles are made, they can be placed in the refrigerator for faster cooling time and they can be stored in an airtight container there or in the freezer.