Preheat your oven to 375 degrees F and line a large baking sheet with parchment paper. Arrange the Saltine crackers in a single layer, ensuring they cover the entire surface of the baking sheet.

In a medium saucepan, combine the unsalted butter and packed brown sugar over medium heat. Stir continuously until the butter is melted and the mixture starts to boil. Let it boil for 3-4 minutes without stirring, until it turns a rich, caramel-like color. Remove from heat and stir in the vanilla extract and continue mixing for 1 minute.

Carefully pour the hot toffee mixture over the Saltine crackers. Use an offset spatula to spread the toffee evenly, making sure each cracker is well-coated.

Place the baking sheet in the preheated oven and bake for 4-6 minutes, or until the toffee is bubbly and golden brown. Watch it closely to prevent burning.

Remove the baking sheet from the oven and immediately sprinkle the white chocolate chips over the hot toffee. Let the chocolate chips sit for a few minutes to melt, then use a spatula to spread the chocolate evenly over the toffee layer. Alternatively, you can melt the white chocolate in the microwave and pour over.

Sprinkle the dried cranberries and orange zest evenly over the melted white chocolate.

Let the toffee cool completely at room temperature, or place it in the refrigerator for about 30 minutes to speed up the setting process.
Once fully set, break the toffee into bite-sized pieces and serve. Enjoy this festive treat!