Green Isle Mixed Berry Crumble Bars

Products Used

Mixed Berries

Berry Crumble Bars

Whether you’re looking for a sweet treat in your kid’s lunchbox or an afternoon pick-me-up when working, these Mixed Berry crumble bars are the perfect treat to make in advance and enjoy. You can use Green Isle Mixed Berries, Blueberries or Raspberries in this recipe and a full batch can be made in just under an hour.


For the base

240 grams plain flour

185 grams butter

Zest of ½ lemon

100 grams caster sugar

Pinch salt

25 grams oats

25 grams chopped hazelnuts

For the filling

375 grams Green Isle Frozen Frozen Mixed Berries / Blueberries / Raspberries

40 grams caster sugar

Zest of ½ lemon plus juice

Zest of ½ orange

3 tablespoons cornflour


  1. Preheat the oven to 200 C / 180 C fan and line a 20 cm x 20 cm square tin with parchment paper.
  2. Place the flour, butter and lemon zest into a large bowl and rub the butter into the flour until the mixture resembles breadcrumbs. Stir through the sugar and a pinch of salt then remove ¼ of the mixture and place it into a small bowl. Bring together the larger amount of mixture to form a dough and then press into the tin, smooth out the top with the back of a spoon. Place into the oven and cook for 20 minutes.
  3. To the smaller amount of mixture add the oats and chopped hazelnuts, stir and set aside.
  4. For the filling, mix the frozen berries with the caster sugar, lemon zest and juice, orange zest and cornflour.
  5. Once the base is cooked, remove from the oven and place the filling on top. Spread out to cover the whole of the base then sprinkle the oat and hazelnut crumb over the top of the berries.
  6. Cook in the oven for a further 30 minutes until golden then remove and allow to cool before slicing.

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