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Square of blueberry crumb bar sitting on a table.

Blueberry Crumble Bars

These delicious bar cookies taste like summer with the blueberries and the lemon jumping out at you. The simple crust and streusel topping hold it together for a perfect summer dessert.
5 from 3 votes
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Course: Dessert
Cuisine: American
Diet: Vegetarian
Prep Time: 10 minutes
Cook Time: 50 minutes
Total Time: 1 hour
Servings: 24 bars
Calories: 191kcal
Author: Michelle

Ingredients

For the crust

  • 1 cup unsalted butter room temperature
  • 1 cup granulated sugar
  • 1 egg
  • 1 teaspoon baking powder
  • 1/2 teaspoon salt
  • 1 teaspoon cinnamon
  • zest of one lemon optional
  • 3 cups flour

For the filling:

  • 4 cups blueberries
  • 4 teaspoons cornstarch
  • 1/2 cup granulated sugar
  • 3 tablespoons lemon juice
  • 1/2 teaspoon nutmeg fresh grated

Instructions

  • Preheat oven to 375 and grease a 9×13 glass baking dish.
  • Mix butter, sugar, and egg in a bowl. Add baking powder, lemon zest, cinnamon, and salt, and mix well. Add flour, and mix until crumbly.
    1 cup unsalted butter, 1 cup granulated sugar, 1 egg, 1 teaspoon baking powder, 1/2 teaspoon salt, 1 teaspoon cinnamon, zest of one lemon, 3 cups flour
  • In another bowl, mix together blueberries, cornstarch, remaining 1/2 cup sugar, lemon juice, and nutmeg.
    4 cups blueberries, 4 teaspoons cornstarch, 1/2 cup granulated sugar, 3 tablespoons lemon juice, 1/2 teaspoon nutmeg
  • Pour a little over half the dough crumbs into your prepared pan and pat them down. Pour the blueberries atop that, then sprinkle the remaining crumb mixture on top of the blueberries.
  • Bake at 375 for 50-60 minutes, until the top is a beautiful golden brown color.
  • Let this cool completely before you cut it so that it. Store it in a tightly sealed container, either one the counter or in your fridge.

Video

Equipment

Microplane Zester
Microplane Zester
Glass Bakeware
Glass Bakeware
Whole Nutmeg
Whole Nutmeg

Notes

  • If you use frozen blueberries, use 2 tablespoons cornstarch and increase the bake time by 5-10 minutes.
  • For more tips and tricks, be sure to read the full article above.

Nutrition

Serving: 1bar | Calories: 191kcal | Carbohydrates: 29g | Protein: 2g | Fat: 8g | Saturated Fat: 5g | Polyunsaturated Fat: 3g | Cholesterol: 20mg | Sodium: 67mg | Fiber: 1g | Sugar: 15g

This site uses an online source to provide nutrition estimates as a courtesy. If you need exact values, please calculate yourself.