Fluffy Homemade Marshmallows – Brownie Mischief

Ingredients

• 3 1/4 oz (7g) packets unflavored gelatin powder
• 1 cup (237ml) cold water, divided
• 2 cups (400g) granulated sugar
• 1/2 cup (165ml) light corn syrup
• 1/4 teaspoon fine sea salt
• 2 teaspoons vanilla bean paste or pure vanilla extract
• 6 tablespoons (45g) powdered sugar, sifted
• 2 tablespoons (20g) cornstarch