Ingredients
3 tablespoons unsalted butter
1/2 teaspoon kosher salt
1 10-ounce package marshmallows (any size)
6 cups Rice Krispie cereal
6 plain graham crackers, crushed into crumbs
2/3 cup semi-sweet chocolate chunks (or chocolate chips)
1/2 cup mini marshmallows
Optional: additional mini marshmallows, chocolate chunks, graham cracker pieces for garnish

Gather the ingredients.

Crush graham crackers into large crumbs or chunks in a ziplock bag or in a bowl. Set aside.

Grease a 9x9 inch pan with non-stick spray.

Heat butter to melt in a large saucepan along with the salt. Make sure it is large enough to accommodate all of the marshmallows.

Add marshmallows to pan and turn heat down to low. Stir frequently until marshmallows have melted. Be careful not to let marshmallows brown or burn.

Remove pan from heat and stir in Rice Krispie cereal, slowly adding a few cups at a time.

Let mixture cool very slightly, about 30 seconds to a minute. Stir in graham cracker crumbs, chocolate chunks, and extra mini marshmallows until evenly distributed throughout Rice Krispie mixture. If you add chocolate before treats have cooled slightly, then chocolate will completely melt into the treats, changing look and texture. If you wait too long for them to cool, then you will not be able to stir in the chocolate chunks, marshmallows, and graham crackers.

Pour mixture into greased pan. Lightly grease hands with non-stick spray and press mixture evenly into the pan.

Press in more mini marshmallows, chocolate chunks, and larger pieces of graham cracker, into top of treats, if desired.

After treats have completely cooled, cut into squares or other desired shape.