Preheat oven to 400°F
Line a 10x15 baking sheet with parchment paper or foil.
Add the saltine crackers to the sheet pan face down, in a single layer.
Add the butter to a pan over medium heat. When the butter is melted, add in the brown sugar and bring to a boil.
Continue boiling over medium high heat for 3 minutes (set a timer!), stirring occasionally so the sugar doesn’t burn.
Take the caramel off the heat and stir in the vanilla extract. (be sure to take it off the heat first because the vanilla could make the caramel bubble up)
Pour the caramel sauce evenly over the crackers. Spread it out with an offset spatula so all of the crackers are completely covered.
Bake for 4 minutes. Remove the crackers from the oven.
Turn the oven off. Sprinkle the chocolate chips over the crackers and return to the oven for 1 minute.
Using an offset spatula spread the chocolate until evenly distributed. If using sprinkles or sea salt, add those now.
Let the crackers cool and then refrigerate at least 1 hour, until set.
Break or cut into pieces and enjoy!
Store in an airtight container in the refrigerator.