Preheat your oven to 350°F (175°C). In a large mixing bowl, combine the yellow cake mix with the ingredients listed on the box (usually water, eggs, and oil). Mix until smooth and well combined.
Pour the batter into a greased 9x13-inch baking pan. Bake according to the package instructions, typically around 25-30 minutes, or until a toothpick inserted in the center comes out clean.
Once the cake has cooled for about 10 minutes, use a toothpick or skewer to poke holes all over the top of the cake. Be generous with the holes – this is where the caramel will seep in!
Drizzle the caramel sundae topping evenly over the poked cake, allowing it to fill the holes. Let the cake cool completely before proceeding.
In a separate bowl, whip the heavy cream until soft peaks form. Gently fold in the thawed whipped topping until blended. Spread this creamy mixture over the cooled cake, covering it evenly.
Finally, drizzle the salted caramel sauce over the top of the whipped cream layer. Feel free to get creative with your drizzle pattern!
For the best flavor and texture, refrigerate the cake for at least 2 hours before serving. This allows the flavors to meld beautifully.