Preheat oven to 350.

Line a rimmed baking sheet with parchment paper and lightly spray with cooking spray.

Spread your cracker mixture evenly on the baking sheet.

In a large pot, melt the butter over medium heat. Add the brown sugar and stir until it has dissolved.

Turn up the heat to medium high until the mixture begins to boil. Stir for 3 -4 minute while this boils and gets lighter in color.

Turn off the heat and stir in vanilla.

Quickly pour over cracker mixture and mix gently with a spatula until all of the crackers are completely coated.

Sprinkle salt and cayenne over the top. Bake for 8 - 10 minutes. Know your oven! Do not let this burn.

Let cool and break into pieces. This will keep a long time in a big zip lock bag. (But you will probably eat it sooner!)