Preheat the oven to 325°F and line a small 13×9.5-inch baking sheet with parchment paper, coating it with non-stick spray.
Arrange the pretzels in a single layer on the parchment paper.
In a saucepan over medium/low heat, combine the sugars and butter, stirring constantly until melted and bubbly.
Pour the caramel over the pretzels, spreading it evenly with a spatula, then bake for 10 minutes.
Remove from the oven, sprinkle the chocolate chips over the caramel, and return to the oven for 2-3 minutes.
Spread the melted chocolate evenly, then add desired toppings.
Place in the freezer for 30 minutes or until completely hardened.
Break apart or cut into squares and enjoy!