01 - Line a 9x13-inch baking pan with parchment paper, leaving an overhang for easy removal.
02 - In a large bowl, mix the Rice Krispies cereal and chocolate chips until evenly distributed.
03 - Melt butter in a medium saucepan over medium heat. Stir in brown sugar, corn syrup, and salt until mixture smooths and begins to bubble.
04 - Reduce heat to low and whisk in heavy cream slowly. Simmer, stirring frequently, for 5 minutes until caramel thickens.
05 - Pour hot caramel over cereal mixture and mix thoroughly, ensuring all grains are coated.
06 - Transfer mixture to prepared pan. Use a spatula to compress mixture evenly and smooth the top.
07 - Refrigerate for 1 hour until set and firm.
08 - Lift the slab using parchment overhang, slice into squares, and sprinkle with flaky sea salt before serving.