Delicious Blackberry Crumb Squares, that can be made with fresh or frozen blackberries. These blackberry crumb squares are a great snack or dessert.
These delicious Blackberry Crumb Squares as such a versatile sweet treat for when you’re craving blackberry goodness. You can make these with either fresh or frozen blackberries, which is always great for when fresh blackberries aren’t in season or on sale.
Enjoy the squares as they are for a snack or warm them up and serve with a scoop of vanilla ice cream for a lovely dessert.
And as a bonus, you can even enjoy this one warm from the oven and serve it “cobbler” style (spoon out for a warm, fruit dessert).
This is one of my favourite way to bake with berries. Try it with raspberries or blueberries, too. Enjoy!
Cook’s Notes for Blackberry Crumb Squares
While you can make these squares with either fresh or frozen blackberries, do note that there is a significant difference in baking time between the two. Using frozen (cold) berries, really slows down the baking, so frozen berries will need up to an extra 20 minutes in the oven over fresh berries. All the details are in the recipe card.
Change this one up by using raspberries or blueberries instead. Either fresh or frozen. Follow the same baking time recommendations as for blackberries.
As noted above, you can skip the whole “squares” thing and just spoon this one out warm from the oven to enjoy it as a cobbler. Add a scoop of vanilla ice cream for a great warm, fruit dessert.
These squares keep well made ahead. I like to keep them in the fridge and warm from there. They also freeze well.
I have made these with both fresh and frozen berries. While the frozen berries are usually more economical, I find the fresh berry squares are crispier and keep longer, so if you find a sale on fresh blackberries, that would be my choice. You will need 3 of the small plastic containers.
Blackberry Crumb Squares
Crust and Topping:
- 1 1/2 cups all-purpose flour
- 3/4 cup white sugar
- 1/8 tsp salt
- 3/4 cup cold butter cut into 12 pieces
- 2 large eggs
- 1 cup white sugar
- 1/2 cup sour cream
- 6 Tbsp all-purpose flour
- Pinch salt
- 1 tsp vanilla
- 4 cups fresh or frozen blackberries about 1 lb.
- Icing/Confectioners' sugar, for garnish
- Preheat oven to 350F. Line a 7 x 11-inch baking pan with parchment paper and set aside. (Alternately, you can use a 9x9-inch baking pan).
- Add the flour, sugar and salt to a food processor. Pulse a few times to combine. With the processor running, add the butter cubes and then switch to pulse and pulse until the mixture is crumb-y, with just small pieces of butter visible. Remove 3/4 cup of the mixture and set aside. Pour the remaining mixture into your prepared pan and press down lightly and evenly.
- Bake in preheated oven for 12-15 minutes, or until set. Remove from oven, leaving oven on. Allow to cool 10 minutes.
- Meanwhile, prepare the filling by whisking together the eggs, sugar, sour cream, flour, salt and vanilla in a medium bowl. Once crust has cooled 10 minutes, pour filling overtop of the crust. Scatter the blackberries evenly overtop. Top with the reserved crumb mixture, scattering it here and there, but allowing some of the blackberries to peek out.
- Bake in preheated oven until set and lightly golden. For fresh blackberries, this can be as little as 35-40 minutes. For frozen blackberries, this can be as much as 55-60 minutes. Also, if you are using a 9x9-inch pan, the squares will be slightly thinner, so may cook a little more quickly.
- Remove from oven. You can enjoy "cobbler style" right from the oven or allow to cool completely then cut into squares. Store in the fridge once cooled, but tastes best at room temperature or warmed lightly. These also freeze well.