01 - 
                In the bowl of a stand mixer, sprinkle gelatin over 1/2 cup of cold water. Let sit while you prepare the syrup.
              
              
              
                02 - 
                In a saucepan, combine granulated sugar, corn syrup, remaining 1/2 cup of water, and salt. Cook over medium heat, stirring until the sugar dissolves. Increase heat to high and bring to a boil, cooking until the mixture reaches 240°F on a candy thermometer.
              
              
              
                03 - 
                Slowly pour the hot syrup into the gelatin mixture while the mixer runs on low speed.
              
              
              
                04 - 
                Increase the mixer speed to high and beat for 10-12 minutes, until the mixture is very thick and fluffy. Add cotton candy extract and beat until combined.
              
              
              
                05 - 
                Divide the mixture into two bowls. Add pink food coloring to one bowl and blue to the other, folding each until the colors are evenly distributed.
              
              
              
                06 - 
                Dust a 9x13-inch baking pan with powdered sugar.
              
              
              
                07 - 
                Spoon dollops of the pink and blue mixtures into the pan, alternating colors. Use a spatula to swirl the colors together.
              
              
              
                08 - 
                Let the marshmallows sit at room temperature for at least 4 hours or overnight until set.
              
              
              
                09 - 
                Dust a cutting board with powdered sugar. Turn the marshmallows out onto the board and cut into squares using a knife dusted with powdered sugar.