Dulce de Leche This step is best when done ahead of time for the best caramel. In a large pot (such as a stockpot), on medium low heat, use a whisk to combine together the milk, sugar and cinnamon stick, heating just until they begin to steam and bubble around the edges. Once the mixture begins to bubble, you can whisk in the baking soda, use caution as it is normal for the mixture to bubble up (hence the large stockpot). Continue to simmer the ingredients for 50-60 minutes, stirring frequently, especially as it begins to thicken. The Dulce de Leche is done when it is deep golden in color and sticks to the back of a spoon. Once it is done you can remove the pot from the heat and carefully remove the cinnamon stick. Then whisk in the vanilla extract and butter. Allow the ingredients to cool and thicken. When it reaches room temperature you can store it covered in your refrigerator for up to a week.
Prepare. When you are ready to make the bars, line a 13x9 baking dish with parchment. Also, preheat your oven to 350f.
Cinnamon Sugar In a small bowl, use a whisk to combine together the cinnamon and sugar. The cinnamon sugar will be divided into thirds for this recipe. Sprinkle the first third of the mix in the bottom of the prepared baking dish.
Crescent Rolls. On a clean work area, carefully unwrap and separate the crescent sheets. Then place the unwrapped rolls into the bottom of your prepared baking dish, gently pressing the seams together to make an even and connected bottom layer. Reserve the remaining crescent sheets for the top of the bars.
Filling. To make the filling, in a large mixing bowl, beat together the softened cream cheese with a third of the remaining cinnamon sugar until combined. Then scrape down the sides of the bowl and add the egg and vanilla extract and mix until combined.
Layer. Evenly spread the cheesecake filling over the crescent roll dough in your baking dish. Then top the cheesecake filling with the remaining crescent roll sheets as the top layer, evenly covering the cheesecake layer.
Topping. For the topping, evenly spread the melted butter over the top crescent roll layer. Then sprinkle the remaining cinnamon sugar over the melted butter.
Bake. Bake in the bars for 25-30 minutes or until the top crescent roll layer is golden brown. Allow the bars to cool.
Serve. You can serve your bars with the Dulce de Leche drizzled on top, on the side, or both.