Ice Cream Sandwich Cake
Make ahead: To assemble and freeze the cake 4 to 24 hours in advance of serving: In Step 2, beat 3/4 cup of the heavy cream and 1 tablespoon of the powdered sugar until stiff peaks form. Assemble the cake as instructed in Step 3 (using all of the whipped cream), then cover and freeze cake up to 24 hours. When ready to serve, beat remaining 1 1/4 cups heavy cream, remaining 2 tablespoons powdered sugar, and the 1/4 teaspoon vanilla until stiff peaks form. Use freshly whipped cream to complete cake as instructed in Step 4.