Line an 8×8 or 9×9 baking pan or glass baking dish with parchment paper.
In a large bowl, mix the oats, rice cereal, salt, and raisins. Set aside.
In a small pot, melt the butter, brown rice syrup, and brown sugar. When it starts to boil, reduce the heat, and cook for 4 minutes on medium-low, but make sure the mixture continues to minimally bubble. Stir often. After 4 minutes, turn off the heat, and add the vanilla. Stir to combine.
Pour the liquid mixture into the dry mixture. Mix well to combine all ingredients.
Dump evenly coated mixture into the lined baking dish. Cover with parchment paper, and press down with your hands until the mix is well packed. Just when you think you’ve pressed down enough, press again.
Allow the pan to cool at room temperature for at least 2 hours.
Lift the parchment paper out onto a cutting board, and slice into 12 bars.