I have so many favorite pie fillings but here's one of my best recipes! You can use fresh when they are in season, and frozen berries work equally as well.
I have wonderful neighbors, who have both blackberry and raspberry bushes. On occasion, I have swapped pies for berries with them and purchased the blueberries fresh in bulk at Sam's Club.
And with ice cream on top...
Affiliate links are your convenience - you don't pay more and I get small referral amounts. It helps us both & the site.
Instant ClearJel Kitchen Scale