sharp knife, pizza cutter, or cookie cutters for cutting marshmallows
wire sieve for adding powdered sugar coating
Ingredients
3 x7 g packagesunflavoured gelatine3 x 7 grams = 21 grams total
1cupvery cold waterdivided
1cupwhite corn syrup
1 ½cupwhite sugar
¼teaspoonsalt
1teaspoonvanilla
½cupcornstarch
½cuppowdered sugar
non-stick cooking spray
1-4drops per bowlliquid food coloring
Instructions
Pour ½ cup cold water into the bowl of a stand mixer fitted with the whisk attachment. Sprinkle gelatin evenly over the water and let sit while you make the syrup.
3 x 7 g packages unflavoured gelatine, 1 cup very cold water
In a medium heavy-bottomed saucepan, combine sugar, corn syrup, salt, and remaining ½ cup water. Cook over medium heat, stirring until sugar dissolves. Once boiling, stop stirring. Clip a candy thermometer to the pan and cook until the mixture reaches exactly 240°F, about 7 to 10 minutes.
1 cup very cold water, 1 cup white corn syrup, 1 ½ cup white sugar, ¼ teaspoon salt
With the mixer running on low speed, pour the sugar mixture down the side of the bowl slowly into the gelatine. Once the sugar mixture is all added, turn the mixer on high speed. Let the mixture whip for about 12-15 minutes, until the outside of the bowl is lukewarm and no longer hot, and the mixture is light and fluffy. In the last minute, add the vanilla to the mixture. While the marshmallow is whipping, prepare your pan. Combine the powdered sugar and cornstarch. Spray the pan with non-stick cooking spray. Use a sifter to cover the bottom of the sides of the pan with the powdered sugar mixture.
1 teaspoon vanilla, ½ cup cornstarch, ½ cup powdered sugar, non-stick cooking spray
Working quickly while the mixture is still warm and easy to stir, divide the marshmallow mixture evenly among 6 bowls. (This is the tricky part! Having someone help makes it easier.) Add food coloring to each bowl: red (2 to 4 drops), orange (mix red + yellow), yellow (2 to 4 drops), green (mix blue + yellow), blue (2 to 4 drops), and purple (mix red + blue). Stir until color is evenly distributed.
1-4 drops per bowl liquid food coloring
Starting with red, spread the colored marshmallow evenly in the prepared pan. Add the next color on top and continue with all colors in rainbow order (red, orange, yellow, green, blue, purple). Sift a generous layer of the coating mixture over the top. Let sit uncovered at room temperature for at least 6 hours or overnight.
Turn the marshmallow slab out onto a cutting board lightly dusted with coating mixture. Using a sharp knife or pizza cutter sprayed with non-stick cooking spray, cut into 1.5 x 1.5 inch squares. Toss each marshmallow in the coating mixture to cover all sticky sides. Store in an airtight container at room temperature.
Video
Notes
Don't skip the candy thermometer. Accurate temperature is crucial
Work quickly when dividing and coloring since the mixture sets fast as it cools
For more vibrant colors, use gel food coloring
Coat your knife with non-stick cooking spray while cutting to prevent sticking
Can be frozen for up to 3 months in an airtight container