In a saucepan melt condensed milk and chocolate chips over medium heat stirring constantly until smooth
Pour half of the mixture into the lined dish
Place kit kat candy on top
Pour remaining mixture on top of candy and evenly smooth out
Crumble remaining kit kat bars and sprinkle on top
Cover and refrigerate for 2-3 hours until set
Slice, serve, and devour!
Notes
Stir constantly on the stove. The condensed milk and chocolate chips mixture will burn quickly if left unattended. Keep the heat at medium and stir the whole time — it only takes a few minutes to come together.
Use parchment paper. Lining your 8x8 pan with parchment paper before you start makes it much easier to lift the fudge out cleanly once it's set. Leave a little overhang on the sides to use as handles.
Let it chill long enough. Two to three hours in the fridge is the minimum, but if you can leave it overnight, the fudge slices even cleaner and holds its shape better when cut.
A sharp knife is your best friend. Run a large knife under hot water and dry it before slicing. The warm blade cuts through the fudge without cracking the chocolate layers.
Don't skip the crumbled topping. Breaking up a few extra Kit Kat pieces to scatter over the top isn't just for looks — it also signals to anyone grabbing a piece exactly what's inside.