Petite Sweets makes its famous custard in-house, and Liberty Kitchen & Oyster Bar uses that, as well as pies and cakes (also from Petite Sweets), to make some of the most outrageous milkshakes around. You want a pecan pie shake? Done. How 'bout carrot cake with vanilla custard? YES. The selection depends on what flavors of cake and pie Liberty Kitchen has on a particular day, but the kind cooks will blend any of them into a shake for you. If you're less inclined to have your cake and drink it, too, that luscious custard alone (maybe with a few toppings) makes one sweet shake.