Chocolate Toffee Matzo Crack

Name: Chocolate Toffee Matzo Crack
Cook time: 30 min
Total time: 30 min
Cuisine: Israeli
Ingredients: 4 to 5 lightly salted matzos, (preferably the Streit's brand - see note below); 1 cup (2 sticks) unsalted butter; 1 cup (packed) dark brown sugar; 1 (12-oz) bag semi-sweet chocolate chips (I use Ghirardelli); 1 heaping cup chopped pecans, (toasted if desired, for maximum flavor (see note below)); ½ teaspoon sea salt flakes or kosher salt