Find blueberry puree and freeze-dried blueberries at Whole Foods or specialty grocers. However, if you can't find blueberry puree, blend 2 cups of fresh berries in a food processor, then strain using a fine mesh sieve. Or, if you don't mind a little fibrous texture, simply blend 1 cup of fresh berries.
1/4 cup cornstarch
1/4 cup powdered sugar
1 cup blueberry puree, thawed to room temperature, divided
6 tablespoons cold water, divided
2 tablespoons unflavored powdered gelatin
3/4 cup granulated sugar
1/2 cup light corn syrup, divided
1/8 teaspoon salt
1 teaspoon vanilla extract
3/4 cup freeze-dried blueberries
- Fit a large piping bag over a tall cup or container, folding the edges of the bag over the sides of the cup. Lay out two large baking sheets, and place parchment paper over the tops. Sift cornstarch and powdered sugar together in a bowl. Dust parchment paper thoroughly, then set powdered sugar coating aside.
- In a small sauce pan, whisk 1/2 cup blueberry puree and 2 tablespoons water. Whisk in gelatin, and let sit for 10 minutes.
- In a large sauce pan, combine granulated sugar, 1/4 cup corn syrup, 1/2 cup blueberry puree, salt, and remaining water. Bring to boil over high heat, stirring occasionally so sugar does not stick to bottom of pot, and cook until syrup reads 240ºF on a candy thermometer.
- Meanwhile, in electric mixer bowl, pour 1/4 cup corn syrup. On the stove, over high heat, melt gelatin mixture in pot until completely dissolved. Pour gelatin mixture into mixer bowl; set mixer to low; and keep machine running.
- When syrup reaches 240ºF, slowly pour it into mixer bowl. Don't scrape any off of the bottom of the pan; it will affect the marshmallow's texture. Increase the mixer speed to medium, and beat for 5 minutes. Increase to medium-high and beat for 5-6 minutes more, adding vanilla in last minute. Marshmallow should be fluffy, opaque, and tripled in size. Fold in freeze-dried blueberries with a spatula.
- Load mixture into piping bag or ziplock bag. Pipe 10 long rows of marshmallow per baking sheet. Imperfect lines are OK! Dust with cornstarch/powdered sugar mixture. Let set for 8 hours.
- Using kitchen shears, cut marshmallows into 1/2-inch pieces. Pour powdered sugar mixture and marshmallow into a wire mesh sieve. Under the parchment paper, shake the sieve until marshmallows are fully coated. Use extra coating if necessary. Store marshmallows in a plastic or glass container or plastic bag. Marshmallows will last about a week in a cool, dry setting.
Makes about 400 1/2 inch pieces.
- Desserts, Candy