Line 9x13 pan with parchment, so they'll come out of pan easily.
(Or spray pan with non-stick spray)
In medium-size saucepan, over med-high heat combine and cook together 'til it barely begins to boil:
1 cup corn syrup
1 cup sugar
Remove from heat, then add:
1 cup peanut butter
Stir until smooth.
Pour over 6 cups Rice Crispies Cereal
Pack into prepared pan. Allow to cool. Cut and enjoy!
For chocolate topping:
Melt 1-1/2 cups milk chocolate chips on low in microwave, stirring frequently. Spread over top. Cover and allow to chill in fridge before cutting.
For "Scotcheroos":
Melt 3/4 cup milk chocolate chips with 3/4 cup butterscotch chips on low in microwave, stirring frequently. (Continue as above.)