In a large saucepan melt butter over medium heat. Stir in marshmallows until completely melted.
While this is melting, roughly chop your TWIX Bites.
Stir caramel sauce and salt into the marshmallow mixture.
Remove from heat and fold in cereal and 3/4 of the TWIX Bites.
Immediately press into a greased 9x9 pan. Press down with wax paper.
Sprinkle remaining TWIX Bites over the top. Drizzle with additional caramel if desired.