Three 1/4-ounce packets gelatin, such as Knox
1 cup corn syrup
1 1/2 cups granulated sugar
1/2 teaspoon salt
1 tablespoon pure vanilla extract
Confectioners' sugar, sifted, for dusting
I like to cut the marshmallows into squares for toasting. This allows for even toasting and avoids the hard, cool center that cylindrical marshmallows leave.