01 - Line a 9-inch springform pan with parchment paper to prevent sticking.
02 - Combine crushed cookies, melted butter, and granulated sugar in a medium bowl. Mix until evenly moistened and crumbly.
03 - Press half of the crumble mixture firmly into the bottom of the prepared pan to form an even crust. Place in freezer for 10 minutes to set.
04 - Mix chopped strawberries with strawberry jam in a separate bowl, stirring until strawberries are evenly coated.
05 - Spread half of the softened vanilla ice cream over the chilled crust, using a spatula to create an even layer.
06 - Spoon the strawberry mixture evenly over the ice cream layer, distributing as uniformly as possible.
07 - Top with remaining ice cream, smoothing the surface with a spatula to create a flat top.
08 - Sprinkle remaining crumble mixture evenly over the top and gently press to adhere to the ice cream surface.
09 - Cover tightly with plastic wrap and freeze for at least 4 hours, or until completely firm throughout.
10 - Whip heavy cream with powdered sugar and vanilla extract using an electric mixer until stiff peaks form.
11 - Release cake from springform pan, top generously with whipped cream, and garnish with additional fresh strawberries if desired. Slice and serve immediately.