I like cooking with hash, general method with say 3.5g is to heat it in oven at 110ยฐC for about 35 mins to decarboxylate, then dissolve (or perhaps more accurately 'suspend') in melted butter, then add that to a cake (or similar) mix.
I usually make about 7 rock cakes or similar, then after cooking - split them in half and pop some in the freezer. - I've found that half a cake will keep me happy for an evening.
However - not all hash is good for cooking. I recently got some, which I tasted when suspending in ghee - tasted very salty and bitter, then after sampling the cakes - nasty taste. I don't really want to eat those again.
So I guess a lot of this depends on how the hash was made, and how clean it is (i.e. devoid of other ingredients to max out).
I don't think this method of cooking is worth it with expensive hash, but I think good value with mid-priced hash.
Does anyone have any recommendations for good, clean mid-priced hash that might be suitable?