Preheat your oven to 375 degrees F and line a baking sheet with parchment paper. Arrange the Saltine crackers in a single layer on the baking sheet, making sure they are close together without overlapping.

In a medium saucepan over medium heat, melt the butter and brown sugar together, stirring frequently until the mixture comes to a rolling boil. Let it boil for 4-5 minutes without stirring, ensuring the toffee thickens but does not burn.

Remove the saucepan from heat and carefully pour the hot toffee mixture over the layer of Saltine crackers, spreading it evenly with a spatula to coat all the crackers.

Place the baking sheet in the preheated oven and bake for 5-6 minutes, or until the toffee is bubbly and the crackers have absorbed the toffee mixture.

Remove the baking sheet from the oven and let cool for 5 minutes. Drop spoonfuls of peanut butter on top of the warm toffee and use your spatula to spread into an even layer.

Melt the chocolate in the microwave in 30-second increments and pour over the toffee peanut butter layer.

While the chocolate is still soft, sprinkle toppings over the top for a festive finish.

Allow the toffee to cool at room temperature for about 30 minutes, then transfer it to the refrigerator to set completely (approximately 1 hour).

Once the toffee is firm, remove it from the baking sheet and break it into pieces using your hands.

Serve immediately or store in an airtight container at room temperature for up to one week, or in the freezer for up to two months.