Copycat Starbucks Blueberry Oat Bar

Hi everyone! We are talking about blueberries, again. Aaaand Starbucks, again. A couple weeks ago I showed you how to make a really yummy Blueberry & Lemon hand pie . And last week I made my recipe for a copycat Starbucks Cold Brew Coffee with Sweet Cream. Well, I was at the grocery store the other day and the blueberries were on sale so of course I had to buy them. Years ago, Starbucks had these super delicious blueberry oat bars that I would buy every single time I would walk through those doors. I just couldn’t resist them! Ever since they stopped selling them, I’ve been thinking about how I could recreate them and make them at home. With fresh blueberries sitting on my counter top, it just seemed the perfect time. Adding in some chia seeds and almonds make this more protein packed and perfect for a quick breakfast.

Blueberry Oat Bar

Start with your blueberries, sugar, and juice together. Let it cook on medium heat until the blueberries cook down, about 10 minutes. Mix the cornstarch and water in a small bowl until the cornstarch is dissolved and slowly add into the blueberry mixture. Stir until sauce is thickened. Take off the stove and cool in refrigerator.

Blueberry Oat Bar

While your blueberries are cooling, mix the oats, flour, brown sugar, chia seeds, baking powder and salt together.

Blueberry Oat Bar

Once. all your dry ingredients are mixed thoroughly, add your cubed butter and cut into the mixture with two knives. To cut in butter, always make sure that you are using COLD butter and make sure to coat them in the flour mixture before you start cutting them in. Want to know more? Check this post out on all the ways you can cut butter into your dry ingredients.

Blueberry Oat Bar

Reserve 1 1/2 cups of the crumble mixture and pack the rest at the bottom of your greased 9×13 pan. Press it down evenly and then pour your blueberry mixture evenly over the top. Add the almond slices to the reserved crumble and sprinkle over your blueberry mixture equally. No need to pat down, just keep it loose over the top.

Blueberry Oat Bar

Bake in your 350 degree oven for 35-40 minutes until the top is golden brown.

Copycat Starbucks Blueberry Oat Bar

Don’t these blueberry oat bars look so delicious? Wow are they good. It was so hard to resist eating the whole pan. Maybe, if I had been home alone and I could erase all signs of cooking, I would have eaten them all and nobody would be the wiser.

Copycat Starbucks Blueberry Oat Bar Copycat Starbucks Blueberry Oat Bar

Copycat Starbucks Blueberry Oat Bar
5 from 1 vote

Blueberry Oat Bars

Course Breakfast
Prep Time 15 minutes
Cook Time 40 minutes
Total Time 55 minutes
Servings 12


Blueberry Filling

  • 3 cups blueberries
  • 1/2 cup sugar
  • 1 tbsp orange juice
  • 2 tbsp cornstarch
  • 1 tbsp water


  • 1 1/2 cups flour
  • 1 1/2 cups oats
  • 1 cup brown sugar
  • 1/2 tsp salt
  • 1 tsp baking powder
  • 2 tbsp chia seeds
  • 1 1/2 cups cold butter, cubed
  • 1/2 cup sliced almonds


  1. Combine blueberries, sugar and orange juice in a pan over medium heat. Cook until blueberries are soft, approximately 10 minutes.

  2. Combine cornstarch and water in a small bowl, stir until cornstarch is dissolved. Add to blueberry mixture and stir until sauce is thick. Cool mixture in refrigerator.

  3. In separate bowl, combine flour, oats, brown sugar, salt, baking powder, chia seeds. Stir until mixed thoroughly. Add cold cubed butter and cut into dry ingredients.

  4. Reserve 1 1/2 cups dry crumble for topping.

  5. Cover bottom of greased 9x13 pan evenly with crumble mixture. Press firmly and evenly.

  6. Pour blueberry mixture evenly over base

  7. Mix in the 1/2 cup almonds into reserved crumble. Sprinkle on top of blueberry mixture.

  8. Place in preheated oven for 35-40 minutes until crumble is browned.

Copycat Starbucks Blueberry Oat Bar

I hope you have the chance to make these and eat these. They are so delicious and I know you are going to love them!

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