1-First Step: Make the crust. Start by combining the 2 1/2 cups graham cracker crumbs with the 10 tablespoons melted salted butter in a medium bowl. Stir until the crumbs look evenly coated and feel like damp sand. Press the mixture firmly into the bottom of a 9 by 13 inch dish. Use the bottom of a measuring cup or glass to pack it down well, because a tight crust helps every slice stay neat. Once the crust is pressed in, place the dish in the refrigerator while you make the filling. This quick chill helps the butter firm up and keeps the base from crumbling later. If you want a firmer crust, you can chill it for 20 to 30 minutes before adding the cream layer.

2-Second Step: Whip the cream mixture. In a large mixing bowl, beat the 3 1/4 cups cold heavy cream with the 1 cup powdered sugar until soft peaks form. This usually takes a few minutes with a hand mixer or stand mixer. The cream should look fluffy, not grainy. Set aside about one-third of this whipped cream if you want a little extra on top later. In another bowl, beat the 8 ounces softened cream cheese with the 1/4 cup sour cream until smooth. Add a spoonful of whipped cream to loosen the mixture, then fold in the rest gently. Use slow folding motions so the filling stays airy. This creates the creamy layer that makes Strawberry Lasagna so rich and sliceable.

3-Third Step: Spread the cream layer. Remove the crust from the fridge and spread the cream cheese mixture over it in an even layer. Use an offset spatula or the back of a spoon to get the surface smooth. Try to reach every corner so the dessert layers look clean when cut. If the cream layer is too soft, chill the dish for 10 to 15 minutes before adding the next part. A slightly firmer cream layer helps the strawberry mixture sit on top instead of sinking into the crust. That small step makes a big difference in the final shape.

4-Fourth Step: Make the strawberry gelatin layer. In a heat-safe bowl, add the 3 ounces strawberry gelatin and pour in the 3/4 cup boiling water. Stir until the gelatin is fully dissolved. Then add the 1/4 cup cold water and the 1/4 cup heavy cream. Mix well. Let the mixture cool for a few minutes until it is still pourable but not hot. Stir in the 1 1/2 cups sliced strawberries. If the fruit releases a lot of juice, pat it dry first. This helps keep the filling from getting watery. The gelatin mixture should be bright, fruity, and slightly thick before it goes on top of the cream layer.

5-Fifth Step: Add the strawberry layer. Carefully spoon the strawberry mixture over the cream layer. Spread it gently so it stays even across the dish. If you pour too fast, it may disturb the layer underneath. A slow, gentle spread works best. At this stage, the dessert will look soft, but that is normal. The refrigerator will do the rest of the work. Cover the dish loosely with plastic wrap and chill it for at least 4 to 6 hours. Overnight chilling gives the best texture and the cleanest slices. For more make-ahead dessert ideas that are simple and family friendly, you may also like these chocolate muffins.

6-Sixth Step: Finish with the topping and garnish. Once the dessert has fully set, add the remaining whipped cream if you saved some. Smooth it over the top or pipe it in soft swirls for a prettier finish. Sprinkle or place the 1/2 cup chopped strawberries for garnish over the top. For very clean slices, use a sharp knife dipped in warm water and wiped dry between cuts. This keeps the layers tidy and helps each piece hold its shape. Serve the dessert cold for the best texture.