Line a 9x9 inch baking pan with parchment paper. Set aside.
In a medium microwave safe bowl, microwave the chocolate chips and Nutella in 30 second intervals, mixing until smooth.
Pour in the sweetened condensed milk and mix until fully combined.
Spread the mixture evenly onto the prepared baking pan. Place in the fridge until set, around 3 hours.
Cut into squares and enjoy!