
Fluffy, pillowy, and genuinely melt-in-your-mouth, these plant-based marshmallows prove you don't need gelatin to get that iconic squish. The magic comes from two clever swaps: aquafaba — the liquid from a can of chickpeas — whips up into stiff, glossy peaks just like egg whites, while agar-agar powder stands in for gelatin to give the final slab its structure. A hot sugar syrup cooked to exactly 240°F gets streamed into the whipped aquafaba, building that signature chewy, cloud-like texture from the inside out. One important heads-up: agar sets faster than gelatin, so you'll want to work quickly once the mixture hits the pan. The powdered sugar and cornstarch dusting keeps every square perfectly non-sticky and ready to pop straight into your mouth — or into a mug of hot cocoa. This batch makes 24 generous squares, so there's plenty to share, gift, or quietly eat over the sink. Once you've made these, the store-bought kind — with their animal-derived ingredients and waxy coating — will feel like a real downgrade.
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Lightly grease an 8x8-inch baking pan with cooking spray or neutral oil. In a small bowl, whisk together the powdered sugar and cornstarch. Sift about half of this mixture evenly over the bottom and sides of the greased pan, tapping out any excess back into the bowl. Set the pan and remaining dusting mixture aside.
Combine the sugar, corn syrup, agar-agar powder, and 1/4 cup of the water in a medium saucepan. Stir over medium heat until the sugar dissolves and the mixture is smooth, about 3 minutes. Clip a candy thermometer to the side of the pan, increase the heat to medium-high, and cook without stirring until the syrup reaches 240°F (116°C).
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