Creating No Bake Summer Berry Icebox Cake can be both fun and easy. Just follow these straightforward steps:

1. Whip the Cream: In a large mixing bowl, use an electric mixer to whip the heavy cream until it begins to thicken. Add the powdered sugar and vanilla extract, continuing to beat until soft peaks form.

2. Prepare the Biscuit Layer: In a separate bowl, combine graham cracker crumbs with a little melted butter if desired. Lay down a single layer of crumbs at the bottom of a 9×13 inch baking dish.

3. Add Cream Layer: Spread half of the whipped cream mixture evenly over the graham cracker crumbs, ensuring smooth coverage.

4. Layer the Berries: Distribute half of the mixed berries over the whipped cream layer, adding more for color and flavor.

5. Repeat Layers: Create another layer of graham cracker crumbs, followed by the remaining whipped cream and then the rest of the berries on top.

6. Chill the Cake: Cover the dish with plastic wrap or aluminum foil and place it in the refrigerator. Allow it to chill for at least 3.5 hours or until set.

7. Garnish Before Serving: If using lemon zest or mint leaves, add them just before slicing for an extra pop of flavor and appeal.

8. Serve Chilled: Slice the cake into squares and serve immediately. Enjoy the delightful layers and refreshing taste!