Nutrition per serving may change if servings are adjusted.
2 cups cran-raspberry or apple-raspberry juice
1 cup cold water
4 envelopes unflavored gelatin
⅓ cup sugar
1 cup cold sparkling white grape or apple juice
2 cups fresh raspberries, divided
Bring cran-raspberry (or apple-raspberry) juice to a boil in a small saucepan over high heat.
Meanwhile, pour water into a large heatproof bowl. Sprinkle gelatin over the water; let stand for 3 minutes. Add the juice and stir to completely dissolve the gelatin, 2 to 3 minutes. Add sugar and stir for 1 minute to dissolve. Whisk in sparkling white grape (or apple) juice.
Refrigerate until the mixture is the consistency of thin pudding and is just starting to set around the edges, 1 to 1¾ hours. The time will vary depending on the size of your bowl and how cold your refrigerator is. After 1 hour, start checking every 5 to 10 minutes because it thickens quickly after that.
Gently but thoroughly whisk the mixture until it's uniform. Stir in raspberries. Pour into a 9-by-13-inch pan. Cover the pan with plastic wrap, without touching the jello.
Refrigerate until very firm, about 3 hours. To test if it's ready, touch it with your finger. If your finger does not stick, it's done.
Run a small, sharp knife around the edge of the pan. Cut into 16 squares then gently pry the squares out with a butter knife.
Make Ahead Tip: Refrigerate for up to 3 days; unmold just before serving.
53 calories;0.0 g fat(0.0 g sat); 1.0 g fiber; 12.0 g carbohydrates; 2.0 g protein; 4.0 mcg folate; 0 mg cholesterol; 10.0 g sugars; 7.0 g added sugars; 5.0 IU vitamin A; 8.0 mg vitamin C; 5.0 mg calcium; 0.0 mg iron; 7 mg sodium; 24.0 mg potassium