Crush biscuits into fine crumbs. Mix with melted butter and sugar until it resembles damp sand.
Divide biscuit mixture among 8 cups. Press firmly to form a compact base.
Refrigerate cups while making the filling.
Beat softened cream cheese until completely smooth.
Add powdered sugar, vanilla, and lemon juice. Beat until combined.
In a separate cold bowl, whip heavy cream to stiff peaks.
Gently fold whipped cream into cream cheese mixture in two additions.
Spoon or pipe filling over biscuit base in each cup.
Arrange fresh berries on top. Brush with warm jam glaze if using.
Cover and refrigerate for at least 2 hours.
Garnish with fresh mint just before serving. Serve cold.