1. Line a high sided 13 x 9 baking dish with parchment paper, leave about 2 to 3 inches over the edge. Butter or spray with spray oil on the parchment.  This allows you to be able to lift out the treats and cut them so they can be removed form the parchment paper

Rice Krispie Treats:

1. Melt the 3 table spoons of butter in a large sauce pan on the stove.
2. Add the bag of marshmallows and stir until melted.
3. When melted add the Rice Krispies to the pot and stir to coat all of the cereal.
4. With a spatula spread the Rice Krispie treats in the prepared pan, set aside.

Homemade Marshmallows:

1. First, combine 1/2 cup of cold water & 3 packets of Knox Unflavored Gelatin in the bowl of the stand mixer. Let sit for 10 minutes.
2. Next, in a saucepan mix together 2 cups of sugar, 2/3 cup of light corn syrup and 1/4 cup of water. Stir together. Over medium heat bring to a boil, stirring occasionally. When at a boil, boil rapidly for 1 minute. Turn off and let cool for 2 minutes.
3. When the 10 minutes timer is over for the gelatin & water, turn on the mixer on low to break up the gelatin.
4. With the mixer on low slowly and carefully take the cooled sugar mixture and pour into the mixing bowl.
5. Add the 1/4 tsp of salt to the mixing bowl.
6. Increase the speed of the mixture to high and mix for 6-8 minutes. (watch mixture to make sure it does not become too stiff your you will not be able to spread the marshmallows in your pan on top of the Rice Krispie treats.
7. When the right spreadable consistency, slowly add the vanilla.
8. Spread the Marshmallows over the rice Krispie treats.
9. All the bars to cool, about 30 minutes
10. When cool and the marshmallow is set remove by lifting the parchment paper out of the pan.
11. You can decorate with Candy Corn before or after it cools.
12. Cut into squares or any shape you like.