No Bake Peanut Butter Bars

Bahan-bahan (16 porsi)

• ½ cup brown sugar
• ½ cup butter
• ¼ cup corn syrup
• 1 cup peanut butter
• 1 teaspoon vanilla extract
• 2 cups cornflakes
• 2 cups Rice Krispies cereal
• ¾ cup chocolate chips
• 2 teaspoons vegetable oil