This is such a treat - a fancy, grown up ice cream sandwich. They're incredible messy (especially if you don't let them firm up enough) but oh my goodness, they are so good! I saw this recipe on Smitten Kitchen and had to try it. Yum! The saltine/toffee/chocolate/peanut combo is amazing and so crunchy. If you want want to go through the trouble of making the sandwiches, you could also just crack it up and sprinkle it liberally over vanilla ice cream. It's addicting. I recommend making these the day before you want to eat them so they have a lot of time to firm up in the freezer - makes them a lot easier to eat.
1/2 cup butter cut into chunks
1/2 cup brown sugar
1/4 tsp vanilla extract
1 1/3 cup dark chocolate chips
sea salt (or kosher salt if you don't have sea salt)
2 cups vanilla ice cream, slightly softened
Big handful roasted peanuts (or any other nut of your choice)