In a large bowl, mix together cookie mix, egg, and butter until completely combined. Fold in butterscotch chips, caramel bits, and pretzel sticks.
Grease and flour muffin tins (or use a muffin tin liner), then fill each tin with dough, about 2/3 to 3/4 of the way full (they won't rise like muffins do, so don't worry about them overflowing).
Bake for 9-11 minutes, or until the edges and top start to turn a golden brown.
Remove from a muffin tins (I used a small rubber spatula around the edges and they came right out!) and serve warm and gooey.
Notes
If you are have any leftover, after serving them, then you should store them in an airtight container.