ACCURATE measuring spoons

[FurryDandelionSeekingMissile]

I need measuring spoon recommendations, and this is why.

DP often leaves a measuring spoon in the baking powder for convenience.

Yesterday, I needed half a teaspoon of it, and thought, "Oh that's a tsp measure, I'll get a half-tsp", then noticed the spoon claimed to be a half-tsp. On comparing it to other half-tsp measures (I have several sets, some all mixed together), it was noticeably bigger than some.

So today I got out the calibrated jeweller's scale and some water, and measured the capacity of all my many measuring spoons (all supposedly metric spoons). None of them are remotely accurate, and the supposed 1/2tsp 2.5ml spoon in the baking powder was actually 4ml. I have a tbsp measure that's only just over twice as big as one of my half tsp measures!

This explains why my scones the other week, where I'd added baking powder as per the recipe plus extra to compensate for using plain flour (rather than the self-raising in the recipe), tasted so baking powder-y — I'd put in 66% more baking powder than I believed I had.

All these years of carefully levelling off measuring spoons to make sure I had the right amount of raising agent etc. 🙄

Does anyone have any recommendations for verified accurate measuring spoons available in the UK? This problem is disturbing me rather more than it should

I have a set of spoons which look a lot like this except I got them as a gift about 15 years so not sure on brand and product changes in that time. If you're ordering only from somewhere like Amazon, their returns system is so easy that it would be fine if you calibrated them, then returned if they aren't correctly calibrated.

Thanks — I was hoping someone else had managed to find a set they can vouch for WRT accuracy, so I don't have to go on a buying, testing and returning spoons mission, but perhaps nobody has. I found an American article which tested various sets using the same method I did (precision scales and water) but the exact products they recommended don't seem to be available here.