Put corn syrup and brown sugar in a saucepan over medium heat until it boils. When its boiling, remove from heat, and stir in peanut butter. When the concoction is smooth and resembling light brown goo, mix in the rice crispies. Press the cereal/ goo mixture into a 9 by 9 pan, allow it to cool
I don't know about the nutritional values for this one. You can use low fat peanut butter, but that's always loaded with sugar. If anyone bugs you about how fattening these are, tell them you're a vegan, you need to get the protein from peanut butter. Enjoy.