Line a baking sheet or plate with parchment paper. This will be where you place your caramel clusters to set.
Unwrap all the caramels and place them in a medium saucepan along with the heavy cream. Heat the mixture over medium heat, stirring often to prevent burning, until the caramels are fully melted and smooth.
Once the caramel is melted, turn off the heat and stir in the vanilla extract and kosher salt until evenly combined
Add the Cornflake cereal to the saucepan. Gently fold the cereal into the caramel mixture, ensuring all the flakes are evenly coated.
Use a cookie scoop or a spoon to scoop out portions of the mixture. Gently pack the mixture into the scoop to make compact clusters that hold their shape. Place each cluster on the prepared parchment paper.
Allow the clusters to cool and set completely at room temperature before dipping in chocolate.
Once firmed up and set, melt chocolate in a microwave-safe bowl in 30-second intervals, stirring between each interval, until smooth.
Dip the bottoms of the caramel clusters into the melted chocolate and place them back on the parchment paper. Refrigerate briefly until the chocolate hardens, then remove from the refrigerator and store the clusters at room temperature.