Line a 9-inch square baking pan with parchment paper, leaving some overhang for easy removal.
In a large bowl, whip the heavy cream with powdered sugar and vanilla extract until soft peaks form.
2 cups heavy cream, ½ cup powdered sugar, 2 teaspoons vanilla extract
Arrange a layer of graham crackers in the bottom of the pan. Spread half of the vanilla ice cream over the crackers.
18-20 graham crackers, 2 -3 pints vanilla ice cream
Add half of the whipped cream, swirling in half of the strawberry jam and half of the sliced strawberries.
1 cup strawberry jam, 2 cups sliced fresh strawberries
Repeat with another layer of graham crackers, followed by the remaining ice cream and whipped cream. Swirl in the remaining jam and scatter more strawberries on top.
Cover the cake with plastic wrap and freeze for at least 4 hours, or until firm. Remove from the freezer and lift the cake out using the parchment paper.
Let it sit for 5 minutes before slicing. Top with whipped cream and fresh strawberries before serving.
Whipped cream, Fresh strawberries