These Rice Krispie treats are extra gooey, decidedly buttery, and deliver the perfect marriage of salty and sweet. Plus, they’re made with homemade browned butter, so there’s nutty, caramelized goodness in every stretchy bite.
Line an 8-inch square baking pan with aluminum foil. Spray the foil with nonstick cooking spray.
Melt the butter in a large saucepan over medium heat.
Once the butter has melted, continue cooking until the butter is golden-brown and has a nutty aroma, stirring frequently. Note: This could take 8 to 10 minutes.
Fold in 8 cups of marshmallows and cook until melted, stirring constantly.
Stir the vanilla extract and kosher salt.
Remove the pan from the heat and fold in the cereal.
Fold in the remaining 2 cups of marshmallows and stir until they are mostly melted, leaving some smaller pieces intact.
Transfer the mixture to the prepared pan.
Using a rubber spatula, gently press the mixture into the pan, being careful not to crush the cereal.
Let stand for 1 hour.
Using the foil, lift the mixture from the pan and transfer to a cutting board.
Cut into 9 squares.
Store these Rice Krispie treats in an airtight container, at room temperature, for up to 5 days.