Salted caramel buttercream made with real caramel is the most decadent, delicious, salty and sweet frosting around. This is a tried and true recipe and tutorial. (same recipe as the chocolate cake recipe, but with a more in-depth how-to)
Sweet potato chocolate chip cookies from The Cookie write. I recommend replacing maple sirup with date syrup. You may need to add a bit more to get sufficient sweetness, so try replacing the flax egg with date syrup too.