01 -
Combine chocolate chips, condensed milk, and butter in microwave-safe bowl.
02 -
Microwave 30 seconds, stir, then 15-second intervals until melted.
03 -
Stir in vanilla and salt until smooth.
04 -
Pour into parchment-lined 8x8 pan, add toppings if desired.
05 -
Refrigerate 1 hour until set.
06 -
Remove from pan and cut into squares.