Set the oven to 350°F (180°C).
Line a 13 × 9-inch (33 × 23 cm) baking pan with parchment paper or aluminum foil, leaving extra on the sides for easy lifting later.
Lay the saltine crackers in a single, even layer across the bottom of the pan. Break a few as needed to fill all gaps.
1 sleeve saltine crackers
In a medium saucepan over medium heat, melt the ¾ cup butter and 1 cup brown sugar, stirring constantly. Once the mixture begins to boil, reduce the heat slightly and let it simmer 3–4 minutes without stirring, until it thickens and becomes caramel-like.
¾ cup unsalted butter, 1 cup packed brown sugar
Carefully pour the caramel over the crackers, spreading it evenly with a spatula.
Bake in the preheated oven for 5–7 minutes, or until the caramel is bubbling and slightly darkened.
Remove the pan from the oven and immediately sprinkle 2 cups of chocolate chips over the hot caramel.
2 cups semi-sweet chocolate chips
Let them sit for a few minutes to melt, then spread the chocolate evenly with a spatula. Sprinkle 1 cup of holiday sprinkles over the warm chocolate.
1 cup holiday sprinkles
Allow to cool at room temperature for 15 minutes, then refrigerate for 45–60 minutes, or until the chocolate is completely set.
Use the parchment or foil to lift the Christmas Crack out of the pan. Place it on a cutting board and break into bite-sized pieces.