Line an 8"x8" pan with a piece of parchment paper.
In a medium pot (one big enough for all the ingredients except for the chocolate) over low heat, mix together the peanut butter, rice syrup, maple syrup and a pinch of salt.
2/3 cup (174 grams) natural peanut butter, 1/2 cup (150 grams) brown rice syrup, 1/4 cup (60 ml) maple syrup, pinch salt
Heat until the mixture bubbles (it shouldn't come to a full boil but should have some bubbles around the sides and in the middle, too), remove from the heat and stir in the vanilla.
1 tablespoon vanilla extract
Add the cereal and carefully stir until the cereal is well-coated.
4 cups (120 grams) crisp rice cereal
Scoop the mixture onto the parchment paper and pat down so that the mixture is relatively compact.
Let it cool for 10 minutes. Melt the chocolate and peanut butter together and spread over the cereal layer.
1 cup (170 grams) semi-sweet chocolate, 6 tablespoons (96 grams) natural peanut butter
Refrigerate for 1-2 hours and then cut into bars.
Place in an airtight container and keep at room temperature (or refrigerate) for up to 1 week.