Chocolate lava cupcakes at Georgetown Cupcake. You have to check if they are on the menu today though, although I think they are one of the holiday flavors so they should be.

The Molten Lava cake at trader joes
2 minutes in the microwave
HEAVEN!
NOT.KIDDING.

To 22:37 - that sounds amazing. Thanks!

I've tried a lot of them and my favorite, somewhat surprisingly, is the hot brownie dessert at Chilis.

Pain Quotidian in downtown Bethesda or Wildwood shopping center has something called Belgian Chocolate Brownie:
http://www.lepainquotidien.com/store-menu/bethesda-menus/#.VH_Whr6rFSU

If you warmed it up and drizzled chocolate sauce on it, it would be a very close (and yummy) approximation.

Wife is craving chocolate lava cake. Where can I pick one up for her in the Bethesda/N. Bethesda/Rockville area?