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Golden blueberry crumble oat bars cut into squares on a warm linen surface with fresh berries alongside, representing wholesome nourishing baked snacks for busy women.

Healthy Blueberry Crumble Oat Bars

March 25, 20263 min read

✦ NOURISHING BAKE RECIPE ✦

Healthy Blueberry Crumble Oat Bars

Vegan option · Gluten-free option · Refined sugar-free · Antioxidant-rich

Makes: 9 bars · Prep: 15 min · Cook: 35 min · Total: 50 min

SARA’S NOTE

These bars are what I make when I want something that feels like a treat but actually nourishes my body at the same time. The crumble is golden and buttery, the berry filling is jammy and bright, and the whole thing comes together with simple, wholesome ingredients. I always add the collagen powder because it bumps the protein up and you truly can’t taste it. They’re perfect for meal prepping a week of snacks, bringing to a gathering, or enjoying your tea. Make them once and I promise they’ll become a regular in your kitchen. 🌿

Macro breakdown of each bar

INGREDIENTS

blueberry bars

🌾 THE CRUMBLE

1½ cups Oat flour or all-purpose flour

1½ cups Old fashioned rolled oats

4 scoops Collagen powder (optional, adds protein and nutrients)

½ cup Coconut sugar

½ tsp Fine sea salt

½ cup Cold vegan butter or regular butter, cubed and room temperature

½ cup Solid coconut oil


🫐 THE BERRY FILLING

1 cup Fresh blueberries (or frozen)

1 cup Frozen mixed berries

⅓ cup Coconut sugar (add a little more if you like it sweeter)

1 tbsp Cornstarch or tapioca starch

½ tbsp Lemon juice, freshly squeezed


METHOD

1. Preheat your oven to 350°F and grease a 9x9 square baking pan.

blueberry bar collage

2. Make the crumble: in a large bowl, mix together oat flour, oats, collagen (if using), coconut sugar, sea salt, butter, and coconut oil until the mixture resembles coarse, chunky sand. Don’t overmix, you want texture here.

3. Press two thirds of the crumble mixture firmly into the bottom of your prepared pan. Set the remaining third aside.

4. Make the filling: warm the berries and coconut sugar together in a small saucepan over low-medium heat, stirring gently until the sugar has melted and the berries begin to soften.

5. Remove from heat and stir in the lemon juice and starch until fully combined. The mixture will thicken slightly as it cools.

6. Pour the berry filling evenly over the crumble base, spreading it all the way to the edges.

7. Sprinkle the remaining crumble mixture generously over the top of the berries.

8. Bake for 35 minutes, or until the top is golden brown and the filling is bubbling gently at the edges.

9. Let the bars cool in the pan for at least 30 minutes before cutting. This step is important, they need time to set! Enjoy immediately or store in an airtight container for up to 5 days or freeze them for up to 3 months. ✨


Magic plate breakdown of macro and micro nutrients from blueberry bars

🌿 WHY THESE BARS NOURISH YOU

Blueberries are one of the most nutrient-dense fruits around, packed with antioxidants that reduce inflammation, support brain health, and promote healthy digestion through their soluble fibre content. Oats bring complex carbohydrates for steady energy, help regulate blood sugar, and keep you feeling full and satisfied. Coconut sugar is still a sugar, but it has a lower glycemic index than white or brown sugar, meaning your body absorbs it more slowly and it won’t spike your blood sugar as sharply. And the optional collagen? A quiet boost of protein and gut-supporting nutrients tucked right into your crumble. Every bite is genuinely doing something good.

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blog author image

Sara Tam

Sara Tam is a Holistic Nutritionist, Health Coach, and Educator based in Ontario, Canada. She helps high-achieving women in their 30s nourish their bodies, regulate their energy, and build a sustainable relationship with food and life all without the guilt or the hustle. When she's not writing or working with clients, you'll find her cooking slowly, walking her dogs, cozying up with her hubby and kitty or doing a puzzle in her favourite chair.

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