Phase 1: Prepare the Pan and Oreo Crust

1. 1. Prepare the Pan: Lightly grease the bottom and sides of a 9-inch springform pan. You can also line the bottom with a circle of parchment paper for even easier removal, if desired.

1. 1. Crush the Oreos: Place the 36-40 whole Oreo cookies (filling and all) into the bowl of a food processor. Pulse until they are fine crumbs. Alternatively, place the cookies in a large, heavy-duty zip-top bag, seal it, and crush them with a rolling pin until fine.

1. 1. Combine Crust Ingredients: Transfer the Oreo crumbs to a medium bowl. Pour the 6 tablespoons of melted unsalted butter over the crumbs. Stir with a fork until all the crumbs are moistened and resemble wet sand.

1. 1. Press Crust into Pan: Pour the buttery Oreo crumb mixture into the prepared springform pan. Press the crumbs firmly and evenly onto the bottom of the pan and about 1-1.5 inches up the sides. Use the bottom of a glass or a measuring cup to help pack it tightly.

1. 1. Freeze Crust: Place the pan with the crust into the freezer for at least 30 minutes to firm up. This prevents the ice cream from making the crust soggy.

Phase 2: Add the Ice Cream Layers

Important Note: Soften your ice cream slightly before starting this step. Let it sit at room temperature for about 10-15 minutes, or until it’s spreadable but not melted. Work quickly to prevent it from melting too much.

1. 1. First Ice Cream Layer: Remove the chilled crust from the freezer. Scoop the 1.5 quarts of slightly softened Cookies ‘n Cream ice cream (or your first chosen flavor) onto the crust. Working quickly, use an offset spatula or the back of a spoon to spread the ice cream into an even layer.

1. 1. Freeze First Layer: Cover the pan loosely with plastic wrap and return it to the freezer for at least 1-2 hours, or until the ice cream layer is firm. This prevents the layers from mixing.

Phase 3: Add the Fudge Layer (Optional)

1. 1. Prepare Fudge Sauce:

      • • If using store-bought: Warm the hot fudge sauce slightly until it’s pourable but not hot (you don’t want to melt the ice cream).
      • • If making homemade: In a small saucepan, whisk together heavy cream, sugar, and cocoa powder. Bring to a simmer over medium heat, whisking constantly. Cook for 1-2 minutes. Remove from heat, add chocolate chips, butter, vanilla, and salt. Whisk until smooth. Let it cool to lukewarm or room temperature before using.

1. 1. Spread Fudge Layer: Remove the cake from the freezer. Pour the cooled (but still pourable) fudge sauce over the firm ice cream layer. Gently spread it into an even layer using an offset spatula.

1. 1. Freeze Fudge Layer: Return the cake to the freezer for another 30-60 minutes, or until the fudge layer is set and no longer tacky.

Phase 4: Add the Second Ice Cream Layer (If Using)

1. 1. If Using a Second Flavor: If you opted for a second ice cream flavor, remove the cake from the freezer. Scoop your slightly softened second ice cream flavor over the set fudge layer (or directly onto the first ice cream layer if skipping fudge). Spread it evenly.

1. 1. Freeze Again: Cover and return the cake to the freezer for at least 2-3 hours, or until this layer is also firm. If this is your final ice cream layer before the topping, ensure it freezes solid, preferably for 4 hours or overnight, before proceeding to the topping.

Phase 5: Prepare and Add Whipped Topping

1. 1. Whip the Cream: In a large, chilled mixing bowl, combine the 1 1/2 cups cold heavy whipping cream, 1/4 cup powdered sugar, and 1 teaspoon vanilla extract. Using an electric mixer (stand mixer with whisk attachment or hand mixer), beat on medium-high speed until stiff peaks form. Be careful not to overbeat, or it will turn into butter.

1. 1. Top the Cake: Remove the firmly frozen ice cream cake from the freezer. Spread the whipped cream evenly over the top ice cream layer. You can create decorative swirls with your spatula if desired.

1. 1. Garnish: Sprinkle the 8-12 roughly chopped or broken Oreo cookies generously over the whipped cream. Add chocolate sprinkles or mini chocolate chips if using.

Phase 6: Final Freeze

1. 1. Freeze Solid: Cover the cake loosely with plastic wrap (try not to let it touch the topping too much – you can insert toothpicks to create a tent if needed) and return it to the freezer for at least 4-6 hours, or preferably overnight, until completely firm and solid. This ensures it slices cleanly.