Combine Karo, peanut butter, and sugar.
Microwave 2 minutes at a time
Stir
Repeat microwave for 2 minutes (3-4 more times) until smooth or boiling
Slowly add Rice Krispy cereal
Stir
Pour into a large cookie sheet or muffin tins
Melt chocolate chips.
Stir.
Pour on top of Rice Krispy mixture.