01 -
They’ll keep fine in a sealed container for about a week. Leave them at room temp.
02 -
Grab a small bowl and combine the cornstarch and powdered sugar. Sprinkle some of that blend on your work table. Tip out the slab, take off the parchment, and cover the top with more dusting mix. Slice into squares or use cute cutters if you like. Coat every piece in the dusting blend so they're not sticky.
03 -
Spread the gooey mix into your lined pan. Level things out with a spatula that’s been oiled. Let the whole thing chill out and firm up for at least 6 hours or even overnight.
04 -
Toss in cotton candy flavor plus your choice of food dye. Mix till you get one even color throughout.
05 -
With your mixer going low, slowly stream in the hot syrup over the puffy gelatin. Crank the speed all the way up and let it whip—about 10 minutes—till it looks thick and super fluffy, and cools down some.
06 -
Stir up sugar, corn syrup, salt, and the rest of the water in a pot. Warm on medium till the sugar melts. Crank up the heat so it boils, then don’t touch it until it hits 240°F (115°C) on your candy thermometer.
07 -
Dump half a cup of cold water into the stand mixer bowl along with the gelatin. Give it 5–10 minutes to soak and puff up.
08 -
Lay parchment paper in a square pan, then grease it lightly with some oil or nonstick spray so your marshmallows won’t stick.