1-Step 1: Prepare the Creamy Filling Base Start by ensuring your cream cheese is completely softened. This is crucial for achieving a smooth, lump-free filling. Leave it at room temperature for about 30 minutes before starting, or microwave it in 15-second intervals until soft but not melted. Place the softened cream cheese in a large mixing bowl along with both packages of dry vanilla instant pudding mix. Beat these together using an electric mixer on medium speed until well blended, about 1-2 minutes. The mixture will look thick and slightly dry at this stage, which is perfectly normal.

2-Step 2: Add Milk Gradually With the mixer running on low speed, gradually pour in the cold milk. Adding it slowly while mixing helps prevent lumps from forming and ensures a silky smooth consistency. Continue beating for about 2 minutes until the mixture thickens considerably.

3-Step 3: Fold in the Whipped Topping Take your whipped topping or homemade whipped cream and measure out 1/2 cup to set aside for the pan base. Gently fold the remaining whipped topping into the pudding mixture using a rubber spatula. Use a light hand and folding motion rather than vigorous stirring to keep the mixture airy and fluffy. The filling should now be thick, creamy, and spreadable.

4-Step 4: Prepare the Pan and First Layer Grab a 9×13-inch pan and spread that reserved 1/2 cup of whipped topping across the bottom in a thin layer. This creates a barrier that helps the first layer of graham crackers stay in place and makes serving easier. Now arrange 5 graham crackers across the center of the pan. You’ll likely need to break 2 additional crackers into pieces to fill in the edges where whole crackers won’t fit. Don’t worry about making it perfect, the layers above will hide any imperfections.

5-Step 5: Add the Pudding and Berry Layers Scoop about one-third of your pudding mixture over the graham cracker layer. Use an offset spatula or the back of a spoon to spread it evenly to the edges. Now comes the fun part, sprinkle a generous layer of fresh blueberries and sliced strawberries over the pudding. Use roughly one-third of your berries for this layer.

6-Step 6: Build the Second Layer Repeat the layering process with another round of graham crackers, pressing them gently into the pudding layer beneath. Add another portion of pudding mixture and spread evenly. Top with another layer of blueberries and strawberries. The cake is really starting to take shape now!

7-Step 7: Add the Final Layer Complete your summer berry icebox cake with a third and final layer. Place the last batch of graham crackers, spread the remaining pudding mixture on top, and finish with the remaining fresh berries. The top should be beautifully decorated with colorful berry pieces peeking through the creamy white filling.

8-Step 8: Chill for Best Results Cover the pan with plastic wrap or foil and refrigerate for at least 4 hours. However, overnight chilling produces the best results. During this time, the graham crackers absorb moisture from the pudding and soften into a cake-like texture while the filling sets firmly.

9-Step 9: Add the White Chocolate Drizzle Just before serving, melt your white chocolate chips in the microwave in 30-second intervals, stirring between each interval until smooth. Drizzle the melted chocolate over the top of the cake in a decorative pattern. You can use a fork or a small zip-top bag with the corner snipped off for more control. Slice and serve chilled. This summer berry icebox cake typically yields 12-16 servings, making it perfect for gatherings.