Make these amazing rice crispy treats:
1 stick unsalted butter, plus extra for the pan
1 10-ounce bag marshmallows
Heaping 1/4 tsp coarse sea salt
6 cups Rice Krispies cereal (about half a 12-ounce box)
Filling:
1 7 oz jar Marshmallow Creme
Dipping:
1/2 cup chocolate chips
1/4...