I saw a funny collision of imperial & metric measurements a while back. My BIL went through an Irish soda bread phase and wanted to learn to bake it himself. I

I saw a funny collision of imperial & metric measurements a while back. My BIL went through an Irish soda bread phase and wanted to learn to bake it himself. I suggested he find a recipe that used weight instead of volume, at least for ingredients like flour. He went off and found a YouTube video by some Irish lady, tried her recipe, and was very disappointed with the result. I watched the video to help him debug and when this lady measured small quantities like salt and soda with a teaspoon she used an actual tea spoon, as in a spoon you’d use to make tea, not a “teaspoon” like a specifically-sized baking measuring implement. So no wonder the recipe didn’t turn out for him, who knows what her “teaspoon” worked out to actually be. But it was very funny to me to run into this weird disconnect of a modern European “x grams of flour” combined with the very traditional “this spoon I happened to have in the drawer” (which of course is how measures like cups and teaspoons got started but I didn’t expect to see anyone use that approach in a published recipe this century).