Preheat your oven to 350°F. Line a 10×15 baking sheet with foil and spray with cooking spray.
Lay out the saltines in a single, cozy little layer.
In a saucepan, melt the butter and sugar-free brown sweetener over medium-high heat.
Bring to a boil, whisking often, and let it bubble for 2 minutes until smooth and caramel-like.
Pour the sugar-free caramel evenly over the crackers, spreading it to the edges.
Bake for 5 minutes — it’ll be bubbly and gorgeous.
Remove from the oven and immediately sprinkle with sugar-free chocolate chips.
Let them sit for a minute to melt, then spread the chocolate into a smooth layer.
Top with chopped nuts.
Let it cool completely (the fridge speeds things up), then break into pieces and try not to eat half the tray.