01 - Combine crushed graham crackers with melted butter in a bowl until evenly moistened. Press mixture firmly into the bottom of a lined 8-inch square or round pan. Refrigerate for 15 minutes to set.
02 - Beat softened cream cheese, powdered sugar, and vanilla extract in a large mixing bowl until smooth and creamy, about 2 minutes.
03 - In a separate chilled bowl, whip heavy cream until stiff peaks form. Gently fold whipped cream into the cream cheese mixture until fully incorporated.
04 - Spread the cream cheese mixture evenly over the chilled crust using a spatula, creating a smooth surface.
05 - Mash half the fresh raspberries with raspberry jam and lemon juice in a small bowl. Gently fold in remaining whole raspberries.
06 - Spoon raspberry mixture over the cream layer and spread gently. Refrigerate for at least 2 hours or until completely set.
07 - Top with additional fresh raspberries before serving. Slice into squares or wedges and serve chilled.