Prepare the Baking Sheet: Start by lining a baking sheet with parchment paper. Lay out saltine crackers in a single layer, ensuring to cover the entire surface for even toffee coverage.

Make the Toffee: In a saucepan over medium heat, melt butter and brown sugar together. Stir constantly until the mixture begins to bubble and turns a beautiful golden brown.

Combine Flavors: Carefully remove the pan from heat. Whisk in the heavy cream and vanilla extract, stirring until the mixture is completely smooth and combined, creating that luscious toffee.

Assemble Bars: Pour the hot toffee mixture evenly over the arranged saltine crackers. Make sure every cracker is thoroughly coated for the best flavor experience.

Bake: Preheat your oven to 350°F. Bake the bars for 10-12 minutes, until the toffee is bubbling and golden around the edges.

Finish: While it's still warm, generously sprinkle a mix of cinnamon and powdered sugar over the top. Allow the bars to cool completely before cutting them into squares.