Homemade Сherry Marshmallows

 Elaboration

1. In a medium saucepan, bring seedless cherries , 100g sugar and 1 Tbsp lemon juice to a simmer. Mash berries and simmer uncovered 10 min then strain through a fine sieve, pressing on the solids with a spatula. Scrape off the back of the sieve to ensure you have 1/2 cup or 125 grams of puree. Chill the puree over an ice bath until cooled.
2. Combine the purée with 1 egg white in the bowl of a stand mixer fitted with whisk. Beat 8-10 min on high speed or until thick and stiff peaks form. While the cherries/egg white mixture is whipping, proceed with step 
3. In a medium sauce pan, combine 75ml water, 2 tsp agar agar and 1 cup sugar. Place over medium heat, bring to boil then reduce heat to a low boil and cook 5 min, whisking constantly until syrup has thickened and pours from a spoon without dribbling. Remove from heat.
4. With mixer on the LOWEST speed, and as soon as agar syrup is off the stove, immediately pour it in a thin stream into the whipped blackberry mixture. Avoid getting syrup on whisk and bowl. Scrape down the bowl and beat another 2-3 minutes on high speed until stiff peaks form.
5. Right away, transfer to a piping bag fitted with a Wilton 1M large open star tip and pipe roses onto parchment-lined baking sheet.
6. Let stand in a draft free, low humidity, room temperature area, uncovered 6-12 hours, or overnight. Marshmallows will form a glossy film on top and will come off the parchment fairly easily, then match 2 halves together and roll sandwiched marshmallows in powdered sugar.