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["Preheat the oven to 350 degrees and line a 9 x 13-inch baking dish with parchment paper, leaving an overhang that will help you to pull the bars out later. Spray the paper a little with cooking spray.", "", "Beat butter in a large mixing bowl until fluffy. Add brown sugars and cream until fluffy, 2-3 minutes, scraping down the bowl as needed. Beat in eggs, vanilla extract, baking soda, and salt. Add the flour slowly, mixing until just combined, and then stir in the oats. Press about 2/3 of the dough into your prepared pan, covering the bottom. Sprinkle chocolate chips, pieces of the chocolate bar, and nuts (if using) over the top. Pour caramel sauce over top just until the bars are all nice and drizzles (you probably won't use the whole jar).", "", "Take pinches of the rest of your oat mixture and flatten them into ""shingles"" in your hands, laying them over top of your chocolate and caramel filling until it's roughly covered. Bake the bars for 22-25 minutes or until top is light brown. Don't overbake them. Let the bars cool in the dish until they are room temperature. Lift them out and onto a cutting board and slice (I like to drizzle them with melted chocolate at this point). You can store them in an airtight container until you're ready to serve them - and at that point, I recommend heating them up and adding a big scoop of vanilla bean ice cream!"]
