01 -
Preheat your oven and bake the chocolate cake in a 9×13-inch pan according to the package instructions.
02 -
While the cake is still warm, use the end of a wooden spoon to poke holes all over the top.
03 -
In a small bowl, mix the peanut butter and sweetened condensed milk until smooth. Pour the mixture over the cake, ensuring it fills the holes.
04 -
Spread the chocolate fudge topping over the peanut butter layer using a spatula.
05 -
Cover and refrigerate the cake for at least 2 hours.
06 -
Just before serving, spread the whipped topping evenly over the cake and sprinkle with crushed peanut butter cups.