Just poking about in books today and came up with something lovely.
For this recipe, you will need the following ingredients:
Savage Species
Dragonlance Campaign Setting
Dragon Magic
Unearthed Arcana (or the d20 SRD, if you're cheap)
Yep, that's it! We're cooking MINIMALIST-style here, people!
Step 1: Take 1 part Anthropomorphic Bat or Anthropomorphic Raven. You may, if you wish, substitute any other flying beastie with a +0 LA, but since we're working with limited ingredients (just what you can buy at your local emporium), let's stick with the basics.
Step 2: Add one part flaws. Yes, alas, you'll need at least ONE for this recipe. I know a lot of folks think this is a bit of a short-cut, but there's simply no good way to make this recipe quick without adding one in. Besides, no-one sees what you're doing in the kitchen anyhow - how are they going to know the difference?
Step 3: Pour the mix into a Dragonfire Adept mold and let sit.
Step 4: Mix in, gradually, one part Flyby Attack. This is the base of the flavor.
Step 5: Add Flyby Breath. Now this is where the recipe really gets tricky (like a souffle or something). You see, the trick is, Flyby Breath allows your DFA to breathe as a FREE ACTION, as long as he does nothing else but MOVE during the round. The feat was clearly designed with normal dragons in mind - dragons who have a recharge time for their breath and thus would only be able to breathe ONCE in a round, regardless of what action it required.
Congratulations. Your new baked good serves up a piping, fluffy helping of INFINITE DAMAGE at level 1. If your enemy has no fire resistance or immunity and is within 30 feet of you when you take your action, you WIN.
Enjoy!