My recipe is similar to silsa1's. With some small variations.
If you want the crunch, this is what I do:
I don't use caramel topping and I use the large marshmallows. Sometimes the coconut covered ones.
Add 1 Tablespoon lemmon juice
1 small can of pinapple chunks (drained)
1 cup of sliced pecans And a cup of coconut.
Top GENEROUSLY with dark brown sugar& don't top with marshmallows just yet.
Bake for 30 min. at 325 degrees.
Take them out of the oven and set your range to BROIL.
Once again cover the top with more brown sugar cover the top with large marshmallows
Make sure you cut the marshmallows in half, then with a knife or scissors, snip the marshmallows evenly in 4 places, almost to the center. This way they will lay flat.
It's important that you use the large marshmallows instead of the small for this last step.
This is how you get the crunch.
When the broiler light goes off, place them on the top rack , closest to the broiler.
WATCH THEM LIKE A HAWK!...The brown sugar will crystalize fast and you don't want the marshmallows to turn to ash.
Just watch. When the brown sugar starts to bubble and the marshmallows have a nice brown crust, THEY"RE READY! AND CRUNCHY ON TOP!
I think you'll like this recipe.
I hope so.
Good luck!