In a small saucepan over low heat, combine peanut butter, honey (or maple syrup), cocoa powder, vanilla extract, and salt.
Stir constantly until the mixture is smooth and fully combined. This only takes a few minutes, but make sure to keep it moving to avoid scorching.
In a large mixing bowl, stir together the crispy rice cereal and rolled oats.
Pour the warm chocolate-peanut butter mixture over the dry ingredients.
Mix thoroughly until all the cereal and oats are well coated. You want every bit to be enveloped in that chocolatey goodness.
Press the mixture firmly into a parchment-lined 8x8-inch pan.
Use a spatula or the back of a spoon to flatten evenly, making sure it's packed tight.
Chill in the refrigerator for at least 1 hour, or until firm.
Slice into 12 bars and enjoy!