- 3 cups (510g) semi-sweet chocolate chips
- 1 can (14 oz) sweetened condensed milk
- 1/4 cup unsalted butter
- 1 tsp vanilla extract
- In a saucepan over low heat, melt the chocolate chips, condensed milk, and butter, stirring continuously.
- Remove from heat and stir in the vanilla extract.
- Pour the mixture into a lined square baking dish.
- Chill in the refrigerator until firm, then cut into squares.