Homemade Marshmallows

I know they look like tiny tofu squares, but these are delectable little marshmallow clouds. They're time consuming, but fairly simple. 

Ingredients:
3 packages unflavored gelatin
1 cup ice cold water, divided
12 ounces granulated sugar (about 1 1/2 cups)
1 cup light corn syrup
1/4 teaspoon kosher salt
1 tsp vanilla extract
1/4 cup confectioners sugar
1/4 cup corn starch

Instructions:
Place gelatin in the bowl of a stand mixer. Add 1/2 cup of the ice cold water.

In a small saucepan, combine the remaining 1/2 cup ice cold water, corn syrup, salt and granulated sugar. Place over medium high heat, and allow it to cook, covered for 3-4 minutes. Then uncover, and cook until it reaches 240 degrees, which will be about 7-8 minutes. Remove from heat.

Using a whisk attachment, turn the mixer on low, and slowly add the syrup mixture. Once it's all added, turn the mixer on high and let it whip for 15 minutes.

While it mixes, prepare the pan. Lightly mist nonstick cooking spray in a 9x13 pan. Combine the confectioners sugar and corn starch. Add some of the sugar/starch mixture to the pan, and move it around so the mixture is around all the edges and bottom.

When the marshmallow is done whipping, use a greased rubber spatula to pour into the prepared pan. Smooth out as well as you can, then sprinkle more of the starch/sugar mixture over the top. Then you let it sit for at least four hours.

After it has rested, carefully take it out of the pan onto a cutting board that has been sprinkled with the sugar mixture. Using a pizza roller, cut the marshmallow into the desired size and shape. Then roll the pieces around in the sugar mixture to prevent extra stickiness.