Preheat your oven to 400°F (200°C) and line a baking sheet with parchment paper.
Evenly place the Saltine crackers on the lined baking sheet, covering the entire surface.
In a medium saucepan over medium heat, combine the salted butter and light brown sugar. Stir continuously until it boils, then boil for 3-4 minutes without stirring.
Carefully pour the toffee mixture over the crackers, ensuring they are completely covered.
Bake for about 5-7 minutes until bubbly and caramelized, monitoring closely.
Remove from oven and sprinkle chocolate chips over the hot toffee. Let sit for a few minutes, then spread melted chocolate evenly.
Sprinkle with chopped pecans and gently press down with a spatula.
Cool completely at room temperature or refrigerate, then break into pieces and enjoy!