1/3 cup packed light brown sugar
1/3 cup light corn syrup
2 tbs unsalted butter
1/2 cup semisweet chocolate chips
1/2 cup crunchy peanut butter
4 cups rice krispies cereal
1/2 cup white OR semisweet chocolate chips, melted, for decoration

line a 9″x13″ baking sheet with aluminum foil, then lightly butter the foil.

in a small heavy saucepan, mix the brown sugar & corn syrup & bring to a simmer, stirring often until the sugar dissolves. stir in the butter & chocolate chips, & continue stirring until melted & smooth. stir in the peanut butter. remove from the heat.

in a large bowl, toss the cereal with the warm chocolate- peanut butter mixture until well combined; work quickly, before the chocolate sets. spoon the mixture into the prepared pan, pressing it down firmly with the back of a lightly oiled fork or your oiled fingertips.

using a pastry bag fitted with a plain round tip or a small plastic bag, pipe the melted chocolate in a zigzag pattern over the cereal mixture. let stand until set, about 30 minutes.

with a small sharp knife, cut into bars.

makes 30 bars