Blueberry Lemon Oat Squares

Name: Blueberry Lemon Oat Squares
Prep time: 15 min
Cook time: 25 min
Total time: 40 min
Yield: 16 squares
Ingredients: 2 cups rolled oats; 1 cup almond flour; 1/2 cup brown sugar; 1/4 cup melted coconut oil; 1/2 teaspoon salt; 1 teaspoon baking powder; 1/2 cup maple syrup; 1 cup fresh blueberries; Zest of 1 lemon; Juice of 1 lemon

Highlighted under: Modern Baking Ideas

I absolutely love making these Blueberry Lemon Oat Squares, especially during the summer months when fresh blueberries are in abundance. The combination of sweet blueberries and zesty lemon creates a refreshing treat that is both wholesome and indulgent. The oats provide a satisfying chewiness while also making these squares a healthier alternative to traditional desserts. Whether I enjoy them as a snack or a light dessert, they never fail to brighten my day with their vibrant flavors.

Created by

Dorothy Finch

Last updated on 2026-02-07T20:29:36.081Z

When I first stumbled upon a recipe for Blueberry Lemon Oat Squares, I knew I had to try my hand at it. The idea of combining the tartness of lemon with the sweetness of blueberries in a chewy oat square was simply irresistible. After experimenting a few times, I discovered that using fresh blueberries instead of frozen really makes a difference in both flavor and texture, giving the bars a beautiful burst of juiciness.

Another tip I learned is to let the bars cool completely before cutting them into squares, as this helps them hold together better. I've even shared these with friends and they always ask for more! Whether enjoyed with a cup of tea or as a quick breakfast option, these squares have quickly become a new favorite in my home.

Why You'll Love These Blueberry Lemon Oat Squares
A delightful balance of sweet and tart flavors
Wholesome ingredients that make them a guilt-free treat
Perfect for snacking, breakfast, or dessert

Understanding the Ingredients

The key to delicious Blueberry Lemon Oat Squares lies in the quality of the ingredients. Rolled oats provide the base structure and chewiness, while almond flour adds a nutty flavor and a light texture. It's important to use fresh blueberries; they burst during baking, infusing the squares with their sweet-tart juice. If you don't have almond flour, you can substitute with another nut flour, or even whole wheat flour, but be aware that the texture may vary slightly.

Incorporating zesty lemon juice and zest elevates the flavor profile of these oat squares. The acidity from the lemon not only enhances the sweetness of the blueberries but also balances the richness of the coconut oil used in the recipe. If you prefer a different citrus touch, feel free to experiment with lime or orange; however, for a more classic blueberry taste, lemon is the best choice.

Baking Tips for Perfection

When spreading the oat mixture into your baking dish, make sure to level it out evenly. If the mixture is too thick in some areas, it may result in uneven baking. I recommend using a spatula to press it down gently but firmly. Keep an eye on the baking time, as ovens can vary. You're looking for a golden-brown color, which typically takes about 25 minutes. You can also insert a toothpick to check for doneness; it should come out clean with just a few moist crumbs attached.

Letting the oat squares cool completely in the pan is crucial to achieving the perfect texture. If you cut them too early, they may crumble and lose their shape. After cooling, you can lift the squares out using the parchment paper edges, making it easy to transfer them to a cutting board. If you want them slightly firmer, chill them in the fridge for about 30 minutes before cutting.

Ingredients

For the Oat Squares

2 cups rolled oats
1 cup almond flour
1/2 cup brown sugar
1/4 cup melted coconut oil
1/2 teaspoon salt
1 teaspoon baking powder
1/2 cup maple syrup
1 cup fresh blueberries
Zest of 1 lemon
Juice of 1 lemon

Mix well and pour the mixture into a prepared baking dish.

Instructions

Prepare the Baking Dish

Preheat your oven to 350°F (175°C) and line an 8x8-inch baking dish with parchment paper.

Combine Dry Ingredients

In a large bowl, mix together the rolled oats, almond flour, brown sugar, salt, and baking powder.

Add Wet Ingredients

In another bowl, combine the melted coconut oil, maple syrup, lemon zest, and lemon juice. Pour this mixture into the dry ingredients and stir until well combined.

Fold in Blueberries

Gently fold in the fresh blueberries, being careful not to smash them.

Bake

Spread the mixture evenly into the prepared baking dish and bake for 25 minutes or until golden brown.

Cool and Cut

Allow the oat squares to cool completely in the pan before lifting them out and cutting them into squares.

Enjoy your delicious Blueberry Lemon Oat Squares!

Pro Tips

For an extra touch, you can sprinkle some powdered sugar on top before serving, or serve with a dollop of yogurt for added creaminess.

Serving Suggestions

These Blueberry Lemon Oat Squares are incredibly versatile. You can enjoy them as a quick breakfast with a side of yogurt or as a satisfying snack on the go. For a light dessert, pair them with a scoop of vanilla ice cream or a dollop of whipped cream. Adding a sprinkle of lemon zest on top before serving enhances the visual appeal and flavor.

They also make a fantastic addition to a summer picnic. Just cut them into individual squares and pack them in a container with parchment paper layers in between to prevent sticking. Their portability and delicious flavors make them a favorite for outdoor gatherings or lunch boxes.

Storage and Make-Ahead Tips

Once baked and cooled, these oat squares can be stored in an airtight container at room temperature for up to three days. For longer storage, you can refrigerate them for up to a week. If you prefer to freeze them, wrap each square tightly in plastic wrap and then place them in a freezer-safe bag or container. They can be frozen for up to three months, making them ideal for meal prep.

To reheat, simply let the squares thaw overnight in the fridge, then warm them in the microwave for about 10-15 seconds. This will revive the chewy texture and refresh the flavors. Alternatively, you can enjoy them chilled straight from the fridge, showcasing their bright, refreshing taste.

Questions About Recipes

→ Can I use frozen blueberries?

Yes, but fresh blueberries yield better texture and flavor. If using frozen, be sure to thaw and drain any excess liquid.

→ How long will the squares last?

These oat squares can be stored in an airtight container at room temperature for up to 3 days or in the fridge for up to a week.

→ Can I substitute the almond flour?

Yes, you can use whole wheat flour or a gluten-free flour blend if needed.

→ Is it possible to make these squares vegan?

Absolutely! You can substitute maple syrup for honey and ensure your almond flour is sourced from a vegan brand.