I made these for the hot chocolates and s'mores I have planned for the Surrealette's Vernal Glamping Trip.
3 packets of unflavored gelatin
1 cup of water
1 1/2 cups of granulated sugar
1 cup of light corn syrup
1/4 tablespoon of kosher salt
1 tablespoon of pure vanilla extract
confectioner sugar for dusting
Combine gelatin and 1/2 cup of cold water with electric mixer. Let stand.
Combine sugar, corn syrup, salt and 1/2 cup water in a small sauce pan and cook over medium heat until sugar dissolves. Raise heat to high and cook until 240 degrees. Remove from heat. With mixer on low, slowly add sugar syrup to gelatin. Put mixer on high until mixture is thick. (For me, this was almost a half an hour). Add vanilla.
With sieve, generously dust non metal baking pan. Pour mixture into pan. Smooth the top and dust with confectioner sugar.
Allow to stand uncovered overnight.
Turn marshmallows onto board, cut into squares, and dust with more sugar.