Line a 9x9 pan with foil.
Add the butter, cream, vanilla, and condensed milk to a mixing bowl, mix with an electric mixer until creamy and smooth.
Add the brown sugar and mix again.
Add the flour and mix that in with the electric mixer.
Remove the mixer and clean off the blades. Swap those out for a sturdy spoon. Add half the powdered sugar and mix that in, then add the remaining powdered sugar and mix that in, the dough will be quite stiff. Then add the chocolate chips.
Mix in the chocolate chips.
Scoop the dough into the prepared pan, and pack down evenly. Place in the fridge to chill for at least 3 hours.
Run a butter knife along each side of the pan where there is no foil, then use the foil and lift the fudge out of the pan and place on a cutting board. Use large knife and cut into 16 squares.
Serve and enjoy.