In a saucepan, heat butter until melted over medium-low heat.

Add in cookie butter, chocolate chips and salt. Continuously stir until melted and once melted, turn off heat and remove from burner.

Pour chex into a large bowl and then pour chocolate mixture over top. Using a large spoon, toss to coat until each chex is coated, but do so in a gentle way to not totally crush the chex.

Pour on the powdered sugar and toss until completely coated again. Alternatively, add coated chex and powdered sugar to a large ziplock bag and toss to coat.

Stir in crushed Biscoff cookies.

Enjoy!