Line an 8-inch square dish with parchment paper and spray with nonstick cooking spray. Combine the cereal and oats together in a large bowl; set aside.

In a medium-sized sauce pan over medium heat, stir together the brown sugar, butter, honey, corn syrup and salt. Bring to a boil, and continue to stir for 2 minutes. Remove from heat and stir in the vanilla. Pour over the cereal-oat mixture, stirring to coat. Once thoroughly combined, quickly toss in 3/4 cup of the chopped Snickers. Avoid stirring too much since they'll start to melt into the mixture.

Press mixture evenly into the prepared pan. Sprinkle or lightly press remaining Snickers all over the top. Allow to cool completely, about 2-3 hours. Transfer cooled slab to a cutting board and cut into bars (about 1 inch wide and 4 inches long).

Line a baking sheet with wax paper. In a shallow dish/bowl, heat the chocolate chips and coconut oil together in the microwave until smooth and melted. Working one at a time, dip the bottom of each granola bar into the chocolate, then place onto wax-lined baking sheet.

Once all of the bars have been dipped, transfer the remaining melted chocolate to a small zip-loc bag with the very tip cut off and drizzle the tops of each bar. Refrigerate until chocolate has set. Bars can be wrapped individually with plastic wrap, or stored in an airtight container for up to one week.