The other one that threw me is how am I supposed to measure 1/8th cup of butter?

1/8th of a cup is 2 tablespoons.

But I prefer to measure butter (and most other things -- especially sticky/messy/powdery things) by weight because it's easier. 1 cup of butter weighs about 227 grams, so 1/8 cup is about 27 grams.

In the US, butter is sold in sticks with 1/8 cup markings on the wrapper

Ehy would you measure butter in cups, you dont drink it

Most American cookbooks use volume measures for baking because most of us don’t own scales. It sometimes leads to wildly inconsistent results when an ingredient is compacted too much.

Yeah even the cup measurement itself varies. It's sometimes 250mL and sometimes 236mL and sometimes 227mL.

Cups is a measure of volume. They could just as easily print cc markings, but I don't think they do.

Me: Hey babe, your're almost a litre!

Her: Why?

Me: Because you're a qt!

I'm ashamed to admit that I didn't get this joke until I reread it a few times. Probably because my entire life, I've internally pronounced "qt" as "quart". It took a bit before I realized the joke was shooting for "cutie".

Uh, I think something went wrong with your conversion. 10 quarts is about 9.5 liters.

You're using US quarts; they're using Imperial quarts[0]. (But I expect the recipe was also using US quarts, so still a useful adjustment to note.)

[0] https://www.google.com/search?q=10+imperial+quarts+in+liters

I used the common Unix "units" program, and entered quarts and asked for l (i.e., litres). Maybe it used my locale? GNU programs can be crazy like that.