Pour the milk into a large container, bowl or baking dish.
Add in the frosted animal crackers and allow them to soak for about 10-15 minutes. Because of the frosting on the cookies, soaking them will simply help the layers to be a little bit softer. Additionally, if you’d like the layers to be even softer, you can break the cookies in half. If you do so, soak them in the milk for about 5 minutes instead of the 10-15 minutes.
While the cookies are soaking, whip the cream, sugar and vanilla in a mixing bowl until stiff peaks form. Set aside.
Line the bottom of an 9” spring form pan with wax paper or parchment paper. Begin layering on the cookie pieces. Each layer should fit about 32 cookies.
Add on about 1/3 of the whipped cream.
Continue layering the cookies and cream, ending with the cream on top.
Cover with plastic wrap and refrigerate for at least 5-6 hours, ideally overnight.
Right before serving, remove the cake from the pan. (Run a knife along the edge to help loosen it first). If desired, top with additional sprinkles and white chocolate curls/shavings.