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Gluten-Free Vegan Blueberry Crumb Bars

These gluten-free vegan blueberry crumb bars taste just like blueberry pie! They are made with a tasty oat crumble topping and are bursting with fresh blueberries. Drizzled with a lemon glaze, you really can't go wrong with this easy dessert.
5 from 2 votes
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Course: Dessert
Cuisine: American
Diet: Gluten Free, Vegan, Vegetarian
Prep Time: 10 minutes
Cook Time: 50 minutes
Cooling Time: 1 hour 30 minutes
Total Time: 2 hours 30 minutes
Servings: 9 servings
Calories: 305kcal
Author: Megan



  • 1 cups gluten-free flour blend
  • 1 cup gluten-free certified oats
  • 3/4 cup brown sugar (see notes for vegan option)
  • 1 tsp cinnamon
  • 1 tsp salt
  • 1/2 tsp baking powder
  • 1/2 cup dairy-free butter (melted)
  • 1 tsp pure vanilla extract


  • 2 cups blueberries
  • 1/4 cup granulated sugar (see notes for vegan option)
  • 1 tsp lemon zest (from 1 lemon)
  • 1 tbsp lemon juice (from 1/2 lemon)
  • 1 tbsp cornstarch
  • pinch of salt


  • 1/2 cup powdered sugar (see notes for vegan option)
  • 1 tbsp lemon juice
  • 1 tsp lemon zest


  • In a large bowl, whisk together gluten-free flour blend, gluten-free certified oats, brown sugar, cinnamon, salt, and baking powder.
  • Stir in melted dairy-free butter and vanilla extract.
  • Reserve 1/2 cup of the crust for the topping. Press the remaining crust into a 8x8-inch baking dish lined with parchment paper. Make sure the parchment paper hangs over the edges of the pan so it's easy to remove the bars after baking.
  • In a medium bowl, mix together blueberries, granulated sugar, lemon zest, lemon juice, cornstarch, and salt.
  • Pour the blueberry filling evenly over the crust.
  • Sprinkle the reserved topping over the blueberry filling.
  • Bake at 375F for 45-50 min, until the blueberries begin to burst and the crust is a golden brown. Let sit for at least an hour, until cooled before adding glaze.
  • In a small bowl, mix together the powdered sugar, lemon juice and lemon zest until smooth. If your glaze is too thick, you can add a tablespoon of non-dairy milk, water or additional lemon juice. If it is too thin, add more powdered sugar. Drizzle the glaze over the bars. Allow the glaze to set for 30 minutes.
  • Using the parchment, remove the bars from the baking dish to a cutting board. Cut into squares to serve.


  • Vegan Option - To make these blueberry crumb bars vegan, you'll need to use vegan sugar. Some sugar is processed with bone char, which makes it not vegan. Be sure you know how your sugar is processed if you want these bars to be considered vegan. If you are in doubt organic sugar is not processed using bone char and is vegan. 
  • If you do not need these bars to be dairy-free or vegan, you can use regular butter in place of the plant-based butter. 
  • Not all oats are gluten-free, so use certified gluten-free oats or purity protocol oats. Keep in mind that some people who have celiac disease or gluten intolerances are unable to process oats as well. 


Calories: 305kcal | Carbohydrates: 52g | Protein: 3g | Fat: 11g | Saturated Fat: 2g | Sodium: 342mg | Potassium: 110mg | Fiber: 3g | Sugar: 34g | Vitamin A: 18IU | Vitamin C: 5mg | Calcium: 45mg | Iron: 1mg
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