Preheat oven to 400 F. Line a rimmed baking sheet with foil and spray with non-stick cooking spray.
Add a single layer of saltine crackers to the lined baking sheet.
In a medium saucepan, melt the butter and then stir in the brown sugar and bring to a bubbling boil. Once bubbles form, stir continuously for 2 minutes and then stir in the vanilla or almond extract.
Pour the butter-brown sugar evenly over the crackers and spread to even out, if needed.
Bake in the preheated oven for 6 minutes.
Remove from oven and immediately sprinkle the chocolate chips over the top. Let sit for 2-3 minutes and they will soften. Using a cake frosting spreader or a knife, evenly spread the softened chocolate chips to form the chocolate layer.
While the chocolate layer is still soft, sprinkle the Christmas sprinkles over the top and lightly press into the chocolate.
Let cool to room temperature for about 2 hours.
Once cooled, break the toffee into bite size pieces.
Store Cracker Toffee "Christmas Crack" in a resealable container for up to 5 days. Beyond that time frame, it can be stored in the freezer. (But I predict it will be gone before 5 days!)