"I've spent long hours debating and testing which apples work best in apple pies. It's a serious conundrum. Really. My favorite combination is McIntosh apples with a firm, sweet apple (like Fuji, Gala or Honeycrisp). Some people love using Granny Smith apples in pies - just taste for sweetness and add more sugar, if needed, to compensate for tartness. Basically, you just want 1-2 varieties of apples that hold their shape well. Granted, the McIntosh apples are more of a soft apple but I love them dearly in apple pie. Also, the sour cream is totally optional but adds a delicious creaminess to the pie. I've made this pie with and without - wonderful either way...."