It's easy to make your own Marshmallow Fluff at home with just a few ingredients. This light, creamy, and fluffy recipe is similar to melted marshmallows.
Add the water, granulated sugar, and corn syrup to a small saucepan fitted with a candy thermometer. Heat just until the mixture reaches the soft-ball stage (240°F).
While the syrup is heating, add the whites to the bowl of a stand mixer fitted with the whisk attachment and beat on medium-high speed until soft peaks form.
Once the egg whites have formed soft peaks and the sugar syrup has reached 240°F, turn the mixer to low speed and slowly pour the sugar syrup into the egg whites. If you can, pour the sugar syrup down the side of the bowl, so it has time to cool slightly before hitting the egg whites - but be careful!
Once all of the syrup has been added to the egg whites, turn the mixer to high speed and beat until stiff peaks form about 7-8 minutes.
Transfer to an airtight container and store in the refrigerator for up to ten to fourteen days.
Notes
The eggs whites should be at room temperature for best results.
Be sure the bowl for the egg whites is spotless and grease-free. Your egg whites might not whip properly otherwise.
While the sugar and water mixture is heating - resist the temptation and don't stir it. Sugar crystals may form, causing your fluff to be gritty.
You can substitute honey, glucose syrup, or rice malt syrup for light corn syrup. Note that these substitutions may change the color of your fluff slightly.
After storing this in the refrigerator, you may need to whip it again for a lighter consistency.
Get funky by switching it up and using a different extract flavor. For example, try mint, peppermint, strawberry, coconut, banana, maple, etc. Or, try mixing the zest from one large lemon or medium orange.
Want a Chocolate Marshmallow Fluff? Mix in 1/4 cup cocoa powder during the last few minutes of mixing.