I got this recipe from my sister, who's made these a couple of times. They are delicious! They're as simple to make as a regular Rice Krispies treat, but they have this slightly salty, nutty flavor to them. Once you eat one of these, the regular recipe just doesn't quite do it anymore. :)
6 c Rice Krispies cereal
1 stick butter
1/4 heaping t salt
10 bag marshmallows
In a large saucepan, brown the butter over medium-low heat. Be careful when browing, as there can be a fine line between brown and burnt. :)
Once the butter is brown, mix in the marshmallows until fully melted.
Mix in the Rice Krispies and salt and remove from heat. Press into a 9"x9" baking dish and allow to cool. Cut into squares and enjoy!