Line the bottom of an 8x8" baking pan with parchment paper or spray with cooking spray. Set aside.
Place graham crackers into a Ziploc bag and crush into small pieces.
In a large bowl, add the rice cereal, crushed graham crackers, chocolate and ¼ cup of mini marshmallows together. Use a spoon to stir together; set aside.
Add the butter to a medium-sized pot. Over low to medium heat, melt the butter. Once melted, remove from heat.
Add 10 ounces (1 bag) of mini marshmallows to the pot. Place back on the stove and melt over low heat, stirring until fully melted. Remove from heat.
Add vanilla to marshmallow mixture and stir.
Pour the melted marshmallows over the dry mixture (the cereal, graham crackers, chocolate and extra marshmallows). Stir to combine.
Drop this mixture into your pan and add the remaining ¼ cup marshmallows to the top. Spray hands with cooking spray (or wet hands lightly with water) and press the mixture down into the pan.
Melt about ¼ cup of almond bark (about 2 blocks of chocolate) in a microwavable bowl at 50% power for about 30 seconds until melted.
Place melted chocolate into a pastry bag (or Ziploc bag), cut a small corner off and drizzle across the top of the S’mores Rice Krispies. Optional – add some dehydrated mini marshmallows on top of the chocolate drizzle.
Chill treats in the fridge for about 10 minutes before cutting. Store in a container.