Luxurious German Chocolate Poke Cake

Directions:
Prepare the Cake:
Preheat your oven to 350°F (175°C).
Grease a 9×13 inch baking pan.
In a large bowl, combine the cake mix, water, oil, and eggs. Beat on medium speed for about 2 minutes.
Pour the batter into the prepared pan and bake for 25-30 minutes or until a toothpick inserted into the center comes out clean.
Allow the cake to cool for 10 minutes.
Make the Filling:
Using the handle of a wooden spoon, poke holes all over the cake.
In a medium bowl, combine the sweetened condensed milk and caramel topping.
Pour the mixture evenly over the top of the cake, making sure it fills the holes.
Prepare the Topping:
In a medium saucepan over medium heat, combine the evaporated milk, granulated sugar, brown sugar, butter, and egg yolks.