Blackberry Crumb Bars

KRISTINE'S KITCHEN
11Ingredients
70Minutes
Calories

Ingredients

US|METRIC
  • 3 cups all-purpose flour
  • 1 cup granulated sugar
  • 1 teaspoon baking powder
  • 1/4 teaspoon salt
  • 1 lemon
  • 1 cup unsalted butter (cold, cut into small cubes)
  • 1 egg
  • 1/2 cup granulated sugar
  • 4 teaspoons cornstarch
  • 1 lemon
  • 4 cups blackberries (fresh)
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