Take the cake out of the pan and crumble it with your hands until it is firm.
Press the cake in the bottom of a spring form pan until it's about 1/2" thick.
Add Caramel and Pretzels to the pan.
In a mixer with a whisk attachment, add milk and heavy cream, then add Curious Creamery mix.
Whisk on high for 4-5 minutes (until mixture is thick and creamy).
Pour into the spring form pan and freeze for 4 to 6 hours, add additional pretzels, caramel and candies to the top of the cake, then serve.