step 1

Grease a 9 x 13-inch baking dish with butter, set aside.

step 2

In a large pot, add the butter and place over medium-low heat. Once the butter has melted it will begin to crackle and foam. At this time make sure to whisk constantly. After a few minutes, the butter will turn golden brown, have a nutty aroma, and brown specks will form in the bottom of the pot. Turn heat to low, add the marshmallows, and stir until completely melted and smooth. Remove pot from heat and add the vanilla extract and salt, stir to combine.

step 3

Add the Chex cereal and chopped Oreo cookies, stir until everything is well coated with the melted marshmallows. Make sure to scrape the bottom of the pot to get everything combined.

step 4

Transfer mixture to the prepared baking dish. Press the mixture evenly into the pan using a greased spatula or spoon. Let cool for about an hour before cutting into squares.