Blueberry Crumble Bars

A buttery shortbread-like base, juicy blueberry filling & crumbly crumble topping - these Blueberry Crumble Bars are so easy & delicious!

Blueberry Crumble Bars

Ingredients
For the Blueberry Layer
  1. 2 cups fresh or frozen blueberries
  2. 2 teaspoons cornstarch
  3. 1 tablespoon lemon zest
  4. 1 tablespoon freshly squeezed lemon juice , don't use bottle lemon juice - it's too tart
  5. 1/4 cup granulated sugar

For the Bottom Lay & Top Crumble
  1. 1 and 1/4 cup all-purpose flour , spooned & leveled
  2. 1/2 cup granulated sugar
  3. 1/2 teaspoon baking powder
  4. 10 tablespoons unsalted butter , cold (1/2 cup plus 2 tablespoons)
  5. 1 large egg yolk
  6. 1 tablespoon packed brown sugar
  7. 1 tablespoon granulated sugar

Instructions
  • Preheat the oven to 375F degrees. Line an 8x8 inch square baking pan with aluminium foil and grease with butter. 
  • In a medium bowl toss together the ingredients for the blueberry layer (blueberries, cornstarch, lemon zest, lemon juice & sugar). Set aside.