Recipe developer Adam Dolge shares the keys to rich, creamy, fluffy frozen yogurt using a whole vanilla bean and higher milk fat percentage Greek yogurt. Plan for four hours of freezing.
Place water in a small bowl, and sprinkle with gelatin; set aside for 1 minute. While gelatin blooms, warm milk in a small microwaveable bowl on HIGH for 1 minute. Add milk to gelatin mixture, stirring until gelatin is dissolved, about 5 minutes. Set aside.
Cut vanilla bean in half lengthwise, and scrape out seeds. Transfer seeds to a large bowl; reserve pod for another use (see Tip). Add condensed milk, vanilla, salt, and gelatin mixture to vanilla seeds in large bowl, stirring until well combined. Vigorously whisk in yogurt, about 1/2 cup at a time, whisking until light and fluffy, about 5 minutes.
Pour mixture into a 9- x 5-inch loaf pan; lightly press a piece of plastic wrap directly over surface. Freeze until just firm, at least 4 hours or up to 1 week. Remove from freezer 5 minutes before serving.