Follow these straightforward steps to create your delicious Summer Berry Poke Cake:

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, eggs, and water. Beat on medium speed for 2 minutes until well blended.
3. Bake the Cake: Pour the batter into the prepared pan. Bake for 30-35 minutes or until a toothpick inserted into the center comes out clean.
4. Cool the Cake: Once baked, remove the cake from the oven. Allow it to cool in the pan for about 10 minutes before transferring it to a wire rack to cool completely.
5. Poke the Cake: Once the cake has cooled completely, use the handle of a wooden spoon or a fork to poke holes throughout the cake at even intervals.
6. Prepare the Berry Syrup: If using fresh berries, mash them slightly and mix with sugar (if desired) and lemon juice. Let the mixture sit for about 10 minutes to create a syrup.
7. Soak the Cake: Pour the mixed berry syrup evenly over the poked cake, ensuring it seeps into the holes. Allow it to absorb for about 20 minutes.
8. Frost the Cake: Spread the whipped topping evenly over the top of the cake.
9. Add Fresh Berries: Decorate the top of the cake with the assorted fresh berries, arranging them to create a beautiful design.
10. Chill: For the best flavor, refrigerate the cake for at least 1 hour before serving to allow the flavors to meld.