Preheat oven to 350°.
Place Crispx, pecans and pretzels in a bowl.
Melt brown sugar and butter and boil for 1 minute.
Pour brown sugar, butter mixture over cereal mixture.
Place cereal mixture on a cookie sheet and bake for 6 minutes.
Take cereal mixture out of oven after 6 minutes and stir.
Place cereal mixture back in oven for an additional 6 minutes.
Take out of oven and let cool.
Enjoy!