01 - Preheat oven to 350°F. Line a 9x13 inch baking pan with aluminum foil and lightly grease the surface.
02 - Place saltine crackers in a single even layer across the bottom of the prepared pan, covering any gaps.
03 - In a medium saucepan, melt butter over medium heat. Add brown sugar and stir constantly until combined. Bring to a full boil and cook for 3 minutes without stirring.
04 - Pour the hot toffee mixture evenly over the arranged crackers, spreading gently with a spatula to coat uniformly.
05 - Bake for 5 minutes until the toffee layer is bubbling across the entire surface.
06 - Remove from oven and immediately sprinkle white chocolate chips over the hot toffee. Let sit for 2 to 3 minutes until softened, then spread into an even layer with a spatula.
07 - In a small bowl, combine granulated sugar and ground cinnamon. Sprinkle the mixture evenly over the melted white chocolate layer.
08 - Allow to cool at room temperature for about 30 minutes, then refrigerate until fully set. Break or cut into 24 squares before serving.