Crumble & Flake, have you heard of this tiny place on Capitol Hill?
My favorite pastries are the Ramos Gin Fizz Macaron (Gin, Lemon and Orange Blossom) and also the Pistachios cherry Macaron.
I would also highly recommend the Chocolate Kouign Aman!
I am a big fan of that place but quantities are always limited so keep in mind that you need to go early.
They are open until 3pm (but they may close earlier if they sell out).