Prep the ingredients:Freeze the chocolate chips. Pour the chocolate chips into a freezer safe bowl and store in the freezer while you make the treats.

Measure out your marshmallows and cereal. In a large bowl, measure out 6 cups of Rice Krispies cereal and set it aside. In a separate small bowl, measure out 2 cups of mini marshmallows and set those aside as well.

Prep the pan. Line the middle of a 13" x 9" baking pan with parchment paper. Allow some of the parchment to hang over the sides of the pan, making a sling. Give the paper and the pan a spritz with cooking spray.

Brown The Butter*In a 2qt or larger saucepan, melt the butter over medium heat. When the butter is melted and starts to bubble, turn the heat down to medium low.

Stir the butter constantly to prevent splatter. If the butter starts bubbling too furiously, lower the heat.

You'll start to see the milk solids gathering at the bottom of the pot and clearer liquid rise above. After about 2-3 minutes (add an extra minute if cooking on an electric stovetop) the milk solids will have turned golden brown. Immediately remove the pot from the heat to prevent burning. The milk solids will continue to cook in the residual heat and turn a deep caramel color.

Time to make Rice Krispie TreatsOff heat, add the rest of the bag of mini marshmallows to the browned butter. Return the pan to the stovetop and heat over medium low heat until the mixture is melted and smooth, stirring constantly. Once the marshmallows are completely melted, remove the pot from the heat.

Stir the vanilla and salt into the marshmallow mixture.

Remove the chocolate chips from the freezer, grab the 2 cups of reserved marshmallows and have them ready to go.

Grab the large bowl of Rice Krispies and pour the brown butter marshmallow mixture over the top of the cereal. Working quickly, mix the goo into the Rice Krispies until everything is about three-quarters of the way combined. Add the 2 cups of reserved marshmallows and 1/2 cup of the frozen chocolate chips to the Rice Krispies bowl. Finish mixing everything together until all the ingredients are thoroughly combined. FYI-the some of the chocolate chips will fall out into the bottom of the bowl, but that's ok.

Layer the Rice Krispie Treats and chocolate chips. Scoop out half of the Rice Krispies Treat mixture into the prepared baking dish. Spread out the mixture slightly, but don't press down at this time. Sprinkle 1/2 cup of frozen chocolate chips over the top of the Rice Krispies layer. Allow some of the chocolate chips to fall off the cereal treats into the pan.

Scoop the second half of the Rice Krispies mixture over the first layer. Sprinkle evenly with 1/4 cup of frozen chocolate chips.

Press the cereal mixture into the dish so that it's even and compact. You can do this cleanly by spraying a piece of plastic wrap with cooking spray and setting it over the Rice Krispies mixture while you're pressing. Sprinkle the treats with the last 1/4 cup of frozen chocolate chips and gently press them in to adhere. Use these chocolate chips to fill in any parts of the treats missing chocolate.

Wrap the pan firmly in plastic wrap and let cool and set up for 1 hour. Once set, cut the treats into 12 large squares or 16 smaller rectangles.