Prepare an 8"x8" inch baking pan by coating with butter or a little spritz of avocado oil, set aside.
Add the cereal to a large mixing bowl, set aside. Prepare all the mix-ins and add to the cereal and toss to mix. I like to reserve a little bit of each mix-in so I can add them to the top.
In a medium sized saucepan, add butter and melt over medium low heat.
Once butter is melted add marshmallows and vanilla salt, then melt slowly over medium low heat, stirring constantly to avoid any browning on the bottom of the pan.
Pour this over the cereal and mixins, stirring quickly to coat. I like to use a large rubber spatula so I can scrap across the bottom of the bowl to incorporate all the smaller mixins and melted marshmallow.
Transfer mixture to the prepared pan and press down slightly with a spatula or buttered fingers/palms to fill the pan. I try not to press down to tightly since I like my rice krispie treats to have some "give" to them.
Top with reserved granola and waffle cone pieces as well as freeze dried ice cream and sprinkles.
Allow it to cool and firm up then slice and enjoy!