Step 1

In a large pot over medium-low heat, melt the butter. Add marshmallows and stir until completely melted.

Step 2

Remove from heat and stir in vanilla and crushed chips until completely coated.

Step 3

Transfer to a greased 9x9 baking dish. Using greased fingers, press to flatten.

Step 4

Let sit until cool, then cut into squares and serve. Enjoy!