1-Spray a 9 x 13 pan with: Spray a 9 x 13 pan with non-stick spray and set aside.
2-Unwrap caramels and set 10 aside: Unwrap caramels and set 10 aside.
3-Melt the remaining caramels in the microwave,: Melt the remaining caramels in the microwave, stirring every 30 seconds, until smooth and melted.
4-In the meantime, melt butter in a: In the meantime, melt butter in a large pot over medium heat. Remove from the heat once melted. Stir in the melted caramel and 5 1/2 cups mini marshmallows. Stir until almost combined.
5-Mix in Rice Krispies: Mix in Rice Krispies. Fold in remaining 2 cups mini marshmallows once everything is well combined.
6-Gently press evenly into prepared pan: Gently press evenly into prepared pan.
7-Melted remaining 10 caramels in the microwave,: Melted remaining 10 caramels in the microwave, stirring every 30 seconds, until smooth and melted.
8-Drizzle all over the top: Drizzle all over the top.
9-Let cool and cut: Let cool and cut.