01 -
Preheat oven to 350°F (175°C).
02 -
Grease a 9x13-inch pan with non-stick butter spray.
03 -
In a medium bowl, combine graham cracker crumbs, powdered sugar, and melted butter, mixing well with a spoon.
04 -
Press the mixture firmly into the bottom and sides of the greased baking pan to create an even crust.
05 -
Bake the crust for 5-8 minutes, until slightly golden brown on the edges. Remove from oven and let cool. Note: The crust will harden as it cools.
06 -
Lay the Hershey chocolate bars over the cooled crust, ensuring the entire surface is covered.
07 -
Return pan to the oven for approximately 3 minutes, or until the chocolate begins to melt and looks shiny.
08 -
Pack mini marshmallows tightly over the melted chocolate, covering it completely.
09 -
Turn the oven to "broil" and place the pan in the oven. Watch carefully and remove as soon as the marshmallows are golden brown (about 2 minutes).
10 -
Let the bars cool completely. Optional: Place the pan in the refrigerator for additional cooling, which will make them easier to slice.
11 -
Cut the cooled bars with a warmed, sharp knife to prevent sticking. Serve and enjoy.