Before making marshmallows, you would need:
• 1/4 cup cornstarch
• 1/3 cup confectioners sugar
• 1 envelope unflavored gelatin
• 1/3 cup water
• 2/3 cup granulated sugar
• 1/2 cup light corn syrup
• Pinch of salt
• 1 teaspoon vanilla extract
First, sift the cornstarch and confectioners sugar into a bowl. Lightly grease an 8×8-inch square baking pan and sprinkle 1 tablespoon of the cornstarch-and-sugar mixture into it. Tilt the pan to coat the sides and the bottom. Leave any excess in the pan.
Then sprinkle the gelatin into the water in a small saucepan and let soak for five minutes. Add the granulated sugar and stir over low heat until the gelatin and sugar dissolve.
Third in the large bowl of an electric mixer, combine the gelatin mixture, corn syrup, salt and vanilla and beat for 15 minutes on high speed, until peaks form.
Next spread the fluffy mixture in the prepared pan and smooth the top. Leave for two hours or until set.
With a wet knife, cut the marshmallow mixture into quarters and loosen around the edges. Sprinkle the remaining cornstarch-and-sugar mixture on a baking sheet and invert the marshmallow blocks onto it. Cut each quarter into nine pieces and roll each one in the starch and sugar.
Finally Place the marshmallows on a cake rack covered with paper towels and let them stand over night to dry the surface slightly.