Line a 8 x 11.5 inch baking dish with parchment paper and set aside.
Melt the butter in a microwave safe bowl for about 30 seconds.
In a separate microwave safe bowl, combine the marshmallows and melted butter and toss until the marshmallows are coated. Microwave for about 2-3 minutes, until the marshmallows are melted.
Add the vanilla extract and salt and quickly mix to combine.
Stir in half the rice krispies and mix until completely coated.
Add the remaining rice krispies and mix until well combined.
Add half of the candy and completely incorporate it into the rice krispies mixture.
Pour the mixture into a 8 x 11.5 inch baking dish lined with parchment paper.
Spread the mixture out and loosely press into the pan.
Top with the remaining chopped candy and sprinkles.
Let sit for 30 minutes to one hour before cutting.
Notes
Use whatever type of candy you'd like. As an example, I used 4 Reese’s snack-size cups, 3 Hershey's fun-size, 3 Milky Way minis, 5 Snickers minis, 3 Kit Kats snack-size, 4 Twix fun-size