[wlindley]

Butter in the USA is sold in 1-pound boxes, each containing four quarter-pound "squares" that are marked with tablespoon and fractional-cup gauges. Simply slice off five tablespoons. (There are "Eastern" and "Western" square sizes, depending on where you live.) See: https://en.wikipedia.org/wiki/Butter#Packaging

Indeed, how would you slice cold butter by grams? Is there even a procedure?

[Grumbledour]

Easy. Just slice of parts into your bowl until the scale shows the desired weight. I am a bit envious of American butter packaging, because it saves so much time, but if they ever change anything about it, you are all hosed, because nobody will know what 5 tablespoons was supposed to mean. ;-)

[dukeyukey]

> how would you slice cold butter by grams?

It's more sensible than slicing off butter by spoons, where a spoon is not a square, except the slice of butter is a square!