For the Coating

Mix together the powdered sugar and cornstarch. You will use about 1/2 cup of the mixture for this recipe. Label and store the remainder to use for more marshmallow treats later!

For the Caramel

Stir together the sugar, water, and corn syrup in a small pot and cook over high heat. Stir until the sugar is dissolved and it starts to bubble. Once it starts bubbling, STOP stirring. When the caramel reaches a light amber color remove the pan from the heat and quickly whisk in the heavy cream and salt. Transfer the prepared caramel to a bowl to cool while you make the marshmallows.

For the Marshmallows

Whisk the gelatin and cold water in a small bowl and let soften for 5 minutes.

Stir the sugar, 1/4 cup of corn syrup, water, and salt in a medium pot over high heat. Bring to a boil, stirring occasionally, and bring to 240 degrees F.

While the sugar is heating, pour 1/4 cup corn syrup into a mixing bowl. Melt the gelatin in the microwave for 10 seconds, or until melted. Pour the gelatin into the mixing bowl and, using the whisk attachment, set the mixer on low and let it run.

When the syrup reaches 240 degrees F, slowly pour it into the running mixing bowl. Increase the speed to medium and set a timer for 5 minutes. Increase the speed to medium-high and run for another 5 minutes. Turn the mixer to high for 2 minutes more and beat in the vanilla extract.

Once the marshmallows are done, scoop about 1/4 of the batter into the bowl with the caramel. Whisk the mixture together and then return it to the large mixing bowl of marshmallow. Fold together using a figure-eight motion. Pour the marshmallow into a greased 8×8 pan and smooth with a greased offset spatula. Sift 1/4 -1/3 cup of the coating over the top of the marshmallows and let them sit uncovered for at least 6 hours or overnight.

Use a knife to loosen the marshmallow from the pan. Flip the marshmallows out on to a cutting board covered in coating. Add another 1/4 – 1/3 cup of coating over the sticky side of the marshmallows and cut into large 2×2-inch square or smaller 1×1-inch squares. Be sure to coat the sticky cut edges in more coating.