Blackberries Crumb Bars

These bars are blackberry pie made easy and portable. One buttery, lemon-scented dough does double duty: half is pressed into the pan as a shortbread base, and the rest is crumbled over the top for a craggy, golden crumb finish.

The filling is fresh blackberries tossed with sugar, lemon juice, and cornstarch, which thickens the berry juices as they bake so you get a jammy, sliceable filling rather than a runny mess.

Lemon zest in the dough and juice in the filling keep things bright, balancing the sweet, slightly tart berries.

Once baked and fully cooled, the bars cut into neat squares with a tender crust, a glossy fruit center, and a crumbly top.

They travel well and feed a crowd, which makes them a smart pick for picnics, potlucks, and bake sales.

Pro Tips

• Don’t skip the cornstarch; it sets the berry filling so the bars hold together when cut.
• Press the base layer firmly and evenly for a sturdy foundation.
• Cool completely before cutting, or the filling will run and the bars crumble.
• Use fresh or frozen blackberries; if frozen, don’t thaw first to avoid extra liquid.

Variations

• Swap blackberries for blueberries, raspberries, or a mixed-berry blend.
• Add a handful of oats to the crumble topping for extra crunch.
• Dust the cooled bars with powdered sugar before serving.