1 can sweetened condensed milk
2 cups chocolate chips or chopped chocolate
2 tablespoons butter
1 teaspoon vanilla extract
Pinch of salt
Line an 8×8-inch pan with parchment paper
Combine condensed milk, chocolate chips, and butter in a saucepan
Heat over low heat, stirring constantly until melted and smooth
Remove from heat
Stir in vanilla extract and salt
Pour mixture into the prepared pan
Spread evenly with a spatula
Chill in the refrigerator until firm
Lift out of the pan and cut into squares