Prepare a 9'' pan by spraying with oil or rubbing with butter and adding a piece of parchment paper to act as a sling.
Crush up pretzels and potato chips by placing in a large ziploc bag and either crushing with your hands or using a rolling pin. Crush until they are about the size of the rice krispies.
In a medium saucepot, add butter. Saute over medium heat to brown butter, until butter is a deep golden brown and has some light brown specks, about 5 minutes.
Turn heat off and add in marshmallows. Stir with a spatula until butter and marshmallow are a homogenous, combined mixture.
Add in rice krispies, potato chips, and pretzels. Stir to combine thoroughly. Pour into prepared 9'' pan.
Let cool slightly before removing from pan and cutting into squares.
To store, wrap in plastic wrap or place in an airtight container for up to 5 days.