Good recipe for sour blackberries?

[thursday]

I bought an 18 oz package of blackberries at the store, and they're incredibly sour. I only have 9 or 10 oz left, but I just don't want to keep eating them plain. I'm thinking some sort of slump or variation on blueberry boy bait, I just want something truly delicious. I do have some other fruit in the house and some frozen berries, so I could mix and match a bit...Suggestions?

[LauraGrace]

My immediate thought was a Dutch baby, but ice cream topping would be great too. Peaches and blackberries go well together for a crumble.

[ipsedixit]

Make curd

[EWSflash]

Add a lot of sugar, stir, and eat with a spoon

[sueatmo]

Add a bit of half and and half or ice cream.