Making Raspberry Mousse Cups can be simple when you follow these steps carefully:

1. Prepare the Raspberries: In a small bowl, combine fresh raspberries with 1 tablespoon of sugar. Allow them to sit for about 10 minutes to release some juices.

2. Make the Gelatin Mixture: In another bowl, sprinkle gelatin over 4 tablespoons of water. Let it bloom for approximately 5 minutes. After blooming, gently heat in the microwave for 15-20 seconds to dissolve completely.

3. Whip the Cream: In a large mixing bowl, beat the heavy cream until soft peaks form. Gradually add powdered sugar and continue whipping until stiff peaks form. Add vanilla extract and combine gently.

4. Combine Raspberry Puree and Gelatin: Fold the raspberry puree into the gelatin mixture until well mixed. Then, gently fold this blend into the whipped cream, making sure not to deflate the mixture.

5. Layering: In serving cups or small glasses, add a layer of the raspberry mixture at the bottom. Then add a spoonful of the macerated raspberries for a burst of flavor. Continue layering until almost full.

6. Chill: Cover the cups with plastic wrap and refrigerate for at least 2-3 hours, or until the mousse is well set.

7. Garnish and Serve: Once set, garnish with fresh raspberries, chocolate shavings, or mint leaves for an elegant touch.