Creating Strawberry Jello Cake can be a delightful experience when you follow these simple steps:

1. Preheat the Oven: Preheat your oven to 350°F (175°C). Grease and flour a 9×13 inch baking pan.
2. Prepare the Cake Batter: In a large mixing bowl, combine the cake mix, 1 cup of water, vegetable oil, and eggs. Beat on medium speed for 2 minutes until well blended.
3. Bake the Cake: Pour the batter into the prepared baking pan and bake for 25-30 minutes, or until a toothpick inserted in the center comes out clean.
4. Cool the Cake: Once baked, remove the cake from the oven and allow it to cool in the pan for 10 minutes. Then transfer it to a wire rack to cool completely.
5. Prepare the Jello: In a separate bowl, dissolve the strawberry Jello in 2 cups of boiling water. Stir until fully dissolved and allow to cool slightly.
6. Slice the Cake: Once the cake is completely cooled, use a fork to poke holes all over the top. This will help the Jello soak in.
7. Add Jello to Cake: Pour the cooled Jello over the cake, ensuring it seeps into the holes. Refrigerate the cake for at least 2 hours to allow the Jello to set.
8. Prepare Strawberries: If desired, sprinkle the sliced strawberries with sugar and let them sit for about 10 minutes to release their juices.
9. Top with Whipped Cream: After the Jello has set, spread the whipped topping over the cake evenly. Decorate with the sliced strawberries on top.
10. Chill Again: Return the cake to the refrigerator for an additional 30 minutes before serving.

Following these steps will lead you to a delicious and visually stunning Strawberry Jello Cake that will wow your guests!