Those tiny yellow limes you grew are so intense, Mom -- they're wonderful, but more acidic than regular limes. Today I used some of them in booze-related experiments.
Lime-oncello
First I zested 14 of them and started a batch of limoncello using limes instead of lemons.
I read a few recipes and enjoyed this overly detailed recipe the most. I more or less followed it but didn't filter the vodka -- it seems silly to filter something that's distilled. We had a bunch of Skyy vodka and since we don't drink vodka very often this seemed like a good use for it -- no grain alcohol in my version.
Two hours in, the vodka is already starting to yellow (it's in the jar on the right). After a few months it should be very pretty. Either that, or it'll look like urine. We'll see.
Lime Cordial
So then I had a bunch of dermis-free limes -- way too many for margaritas or mojitos. I thought about juicing them and freezing the juice, but again, they're so acidic, if they were to lose any delicate lime flavors through freezing they wouldn't be very useful -- all tartness, no flavor.
I poked around online for a while and decided to make lime cordial. Rose's Lime Juice is lime cordial, but Rose's seems pretty gross lately. Maybe it's the high fructose corn syrup. I made a gimlet with it over the summer and it wasn't very enjoyable.
Recipes for lime cordial online mostly contain lime juice, simple syrup, citric acid and tartaric acid. I have neither of the latter two ingredients. I decided the limes' acidity was intense enough to make up for the missing citric acid. For the tartaric acid I used cream of tartar. I'm no chemist, but cream of tartar retains the acidic flavor of tartaric acid, which I think is the goal of the acid, and is also a potassium salt...and I figured salt is a positive thing from a preservative standpoint.
I think I can taste the potassium from the cream of tartar a little. There's a slight bitter aftertaste similar to potassium chloride -- the taste of those "salt substitutes," or of Marmite, or of banana bread with too much baking powder. But Lawson says he can't taste it, so it's probably not a big deal.
After some adjustments, here roughly what I ended up with:
2 cups sugar
1 cup water
1 cup freshly squeezed lime juice
1 scant teaspoon cream of tartar
Boil the water and sugar until sugar dissolves. Remove from heat; stir in lime juice and cream of tartar. Strain into bottles and refrigerate.
I'll make gimlets tonight. And I'll let you know how long the lime cordial keeps.