These macaroons are crispy on the outside, and chewy on the inside. The dominant flavour is still coconut, with little bursts of salty peanut flavour and chocolate.
Preheat the oven to 350 °F (175 °C). Line a couple of baking sheets with parchment paper.
In a big bowl, stir together the sweetened condensed milk and the vanilla, then add in the coconut, pretzel sticks, potato chips, and chopped butterfinger bar. Set aside.
Beat the egg whites with the salt in a mixer fitted with the whisk attachment until stiff peaks form.
Fold the egg whites into the coconut mixture (do this gradually as the coconut mixture is very heavy).
With wet hands or wet spoons, dollop golf ball-sized scoops of the macaroon batter onto the parchment lined baking sheet. Wet spoons/hands between every scoop. You should get about 22 to 24 scoops out of the batter.
Start checking the macaroons around 20 minutes, but they will probably bake for about 25 minutes, until they are bottom turns a dark golden brown and the tops too. They taste better when they are a little on the darker side.
Cool the macaroons on the pan for 2 minutes before carefully peeling them off the parchment and transferring them to a wire rack to cool completely.
Melt the dark chocolate in the microwave on medium power, stirring every so often. Drizzle over the tops of the macaroons and let set before enjoying, if you can wait that long.
Notes
For this recipe, I used Cacao Barry Mexique chocolate. You can also use Ocoa from Cacao Barry, a 70% dark chocolate.