Creating these amazing Jello roll ups is simple if you follow these step-by-step instructions:

1. Prepare the Jello Mixture: In a mixing bowl, dissolve the Jello powder in 1 cup of boiling water. Stir until fully dissolved.

2. Add Cold Water: Mix in the cold water, ensuring it is well combined.

3. Combine Gelatin: In a separate bowl, mix the unflavored gelatin with 1 cup of warm water. Stir until the gelatin has completely dissolved.

4. Combine Mixtures: Pour the Jello mixture into the gelatin mixture. Stir thoroughly to ensure even blending.

5. Add Sweetness: Mix in the granulated sugar and vanilla extract (if using). Stir the entire mixture until the sugar dissolves completely.

6. Set the Mixture: Pour the combined mixture into a pan or tray evenly, spreading it out smoothly.

7. Refrigerate: Place the pan in the refrigerator. Allow the mixture to chill for at least 4 hours or until it is fully set.

8. Cut into Shapes: Once set, remove the Jello from the pan. Use a sharp knife or pizza cutter to slice it into strips.

9. Roll It Up: Take each strip and roll it gently from one end to the other to form a roll.

10. Serve or Store: Enjoy immediately or store the rolled Jello in an airtight container in the refrigerator until ready to serve.

Following these simple steps ensures you create delightful Jello roll ups that are sure to impress.