Preheat oven to 350F. Line a 9×13-inch pan with aluminum foil and spray with cooking spray;
set aside.
Make cake according to package directions (likely adding 3 eggs, water, and oil) and bake as
directed (likely about 25 to 28 minutes).

Remove cake from the oven when it’s done, allow it to cool for about 5 minutes, and then using
the blunt end of a wooden spoon, poke holes over the surface of the cake. I didn’t count but I
estimate I poked about 60 holes, evenly spaced over the surface.
Slowly pour the sweetened condensed milk mixture over the holes, taking your time to evenly
distribute it so that all the holes receive some.
Place cake in fridge to cool for at least 10 minutes while you make the frosting or before adding
canned frosting so it doesn’t melt.
To the bowl of a stand mixer fitted with the paddle attachment (or large bowl and handheld
electric mixer) add the cream cheese, butter, confectioners’ sugar, vanilla, salt, and beat on
medium-high speed until fluffy. Add additional confectioners’ sugar if necessary for consistency.
Turn frosting out onto cake and spread into a smooth, even, flat layer using a spatula or knife.
Evenly sprinkle with chocolate chips.
Refrigerate cake for at least 4 hours, or overnight, before serving.