Hot Fudge Sauce

Bahan-bahan (12 porsi)

• 1 cup heavy cream
• 2 tablespoons unsalted butter
• 2/3 cup sugar
• 1/8 teaspoon salt
• 1/4 cup bittersweet or semisweet chocolate chips (or 1½ ounces from a bar, chopped)
• 1/2 cup Dutch-process cocoa, (sifted)
• 1/4 teaspoon vanilla extract or vanilla bean paste