Raspberry Leaves - any ideas on this recipe?

[Goran]

Was thinking about brewing a light beer for the warmer weather.

Has anyone used raspberry leaves in beer (like Badger Long Days)?

I was thinking about the following recipe:
4.5kg Maris Otter

90 min First Gold 7.25AA - 20g
15min First Gold 7.25AA - 50g
0 min First Gold 7.25AA - 50g

WLP007 Dry English Ale Yeast

In secondary make a raspberry and elderflower tea and add to FV. 25g of dried Raspberry leaves and 25g of dried elderflowers.

4.6 % abv
31 IBUs

I have no idea if that is far too little or far too much raspberry leaf. Any ideas?

[Wolfy]

If you made a tea and steeped the raspberry and elderflower could you not add it to taste at the time of bottling?

[Goran]

I could but I'm slightly concerned about losing too much flavour during fermentation. Did that once with elderflowers and the taste was almost completely gone by drinking time.

[boingy]

Raspberry leaf is a new one on me so I just Googled it.
Many of the descriptions mention that it is rich in tannins which is something usually considered to be a bad thing in beer.
A cautious approach would be to split the batch and add the raspberry leaf to a gallon or so to start with and see how it goes.
Wolfy's suggestion of adding it a bottling is also a good one, and would also allow you to add it selectively.

[Goran]

Sorry Wolfy misread bottle for boil - I'm an idiot. Yeah seems a good idea. Also just doing it to a gallon or so seems a good plan. Thanks guys.