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I tried cold brew coffee but found the flavours weren't as developed and it was never bitter enough for me! I do love my double double with espresso iceblocks but I am far too disorganized to premake them 😜

oh man! Sounds like you need to get cold brew from a different place, I'd put cold brew concentrate on par with how flavourful espresso is for sure.

I think you just gave me my Saturday Morning mission!
Cue Mission Impossible Theme Music