BonBon s Hot Fudge Sauce

1 (14 ounce) can sweetened condensed milk

4 ounces semisweet chocolate (such as Guittard®)

4 ounces dark chocolate (such as Guittard®)

3 tablespoons butter

1 ½ teaspoons vanilla extract

Place sweetened condensed milk into a saucepan with semisweet and dark chocolate and butter over medium-low heat. Melt chocolate and butter, stirring constantly, until the sauce is smooth; stir in vanilla extract. Serve warm.