I’d start these the day before you want them finished, because you need to let them cool for quite a while before cutting and dipping (and then they’ll need maybe 30 more minutes before serving). But not too much in advance, because homemade marshmallows maintain texture best when fresh (though they can keep for about three weeks in a sealed container, or can even be frozen). Plan appropriately!
3 packages unflavored gelatin
1/2 cup water
1/2 c. passionfruit puree (from frozen is fine)
1 1/2 cups granulated sugar
1 cup light corn syrup
1/4 teaspoon salt
powdered (confectioner’s) sugar
butter (for greasing the pan)
yellow or orange food coloring (optional)
10 oz. bittersweet chocolate, chopped or chips
1. Empty gelatin packets into bowl of stand mixer (whisk attachment), with passionfruit puree. Stir briefly to combine.
2. In a small saucepan (a bigger one will be heavy and hard to hold steadily at a later stage) combine water, granulated sugar, corn syrup, and salt. Cover and cook over medium high heat for 4 minutes. Uncover and cook until the mixture reaches soft ball stage (240 degrees if you have a candy thermometer), approximately 8 minutes. Once the mixture reaches this temperature, immediately remove from heat; if it continues, it will swiftly turn into hard candy.
3. Turn mixer on low speed and, while running, slowly pour the sugar syrup down the side of the bowl into the gelatin mixture. (Be very careful with the sugar syrup, as it is scaldingly hot and will burn you badly if it gets on your skin.) Once you’ve added all of the syrup, increase the speed to high.
4. Continue to whip until the mixture becomes very thick and is lukewarm, approximately 12 minutes. Add food coloring, if using for the whole batch, during this stage.
5. While it’s whipping, butter a large 9 x 12 pan and dust with powdered sugar. Prepare an oiled spatula for later.
6. Pour the mixture into the prepared pan, spreading it evenly (and swiftly) with an oiled spatula.
7. Dust the top with enough of the remaining powdered sugar to lightly cover. Reserve the rest for later. Allow the marshmallows to sit uncovered for at least 4 hours and up to overnight.
8. Turn the marshmallows out onto a cutting board and cut into squares. As you’re cutting, lightly dust all sides of each marshmallow with the remaining powdered sugar, using additional if necessary. May be stored in an airtight container for up to 3 weeks, or frozen. They’re delicious straight up at this point, if you don’t want to dip them.
9. Dip in melted chocolate chips (melt in microwave on 50% power for a few minutes, in 30 second bursts, stirring in between); add sprinkles if desired, then lay on wax paper to dry for about 30 minutes.