*My ramekins are 6 ounce, so my cakes baked up tall. Sometimes, I take the same recipe but pour it into 8 ramekins instead of 4 and make shorter cakes/smaller servings. I think 8 ounce ramekins might work best, but I'm just letting you know that it's quite flexible and can work in different sizes. Commenters in the original recipe mention that they've also baked it up well as one big cake, but I haven't personally tried it.
*I buy superfine sugar by the box, but you can make it at home in your food processor. Just add the desired amount (plus a couple of tablespoons) to a food processor and process until sugar feels like fine sand. The extra couple of tablespoons will allow for the reduction in volume once you process it. When you're done, you want to end up with the full 2/3 cup measurement of superfine sugar.
*I've made this a zillion times, but this last time, I thought I might like it less sweet. (Perhaps my lemons weren't as tart as usual.) I haven't tested it out yet, but next time, I'm going to try reducing the sugar to 1/2 cup and may skip the addition of confectioner's sugar on top which just adds more sweetness, (though it is a pretty addition!)
*There should be no traces of fat in the clean bowl you use to whip your egg whites. You can always wipe it out with some vinegar to eliminate any traces of fat before you begin.
*Don't over beat your egg whites. You don't want them to become dry, just beat them until they reach stiff peaks.
*When adding the hot water to the pan, do it in a place that's close to your oven so that you don't have to carry the pan of hot water across the room, while trying not to spill it.
*If you have leftovers, they should be refrigerated. I usually flip the ramekin/s over on whatever plate I plan to serve them on and leave the ramekin in place as a cover. Then they go right into the refrigerator. When it's time to serve them again, I just lift the ramekin cover and I'm good to go. This way, I don't have to worry about covering the exposed pudding top and ruining it. Or, you could just cover the right side up ramekin with plastic wrap or foil, and eat it with a spoon later, scooping down to the bottom to get to the pudding layer.
Recipe from Tyler Florence