Blueberry Banana Oatmeal Bars

Featured in: Sweet Treats

These chewy bars combine ripe banana, fresh blueberries, rolled oats, and a protein boost for a nutritious start to your morning. The mixture balances sweetness from honey or maple syrup with warm cinnamon, offering a flavorful and wholesome option. Baked until golden, these bars are easy to slice, portable, and satisfy hunger with natural ingredients. Whether enjoyed as breakfast or a snack, their soft texture and balanced flavors promise a tasty and energizing treat.

Updated on Mon, 22 Dec 2025 10:00:00 GMT
A tray of delicious Blueberry Banana Oatmeal Protein Bars, perfect for a quick breakfast. Save
A tray of delicious Blueberry Banana Oatmeal Protein Bars, perfect for a quick breakfast. | ovenharmony.com

I started making these bars on Sunday nights when I realized I was spending half my mornings staring into the fridge with no plan. The first batch came out a little crumbly because I skipped the applesauce, but even then, my kids devoured them before they cooled. Now they're part of our weekly rhythm, and the smell of cinnamon and warm blueberries has become my favorite way to end the weekend.

I packed these for a early morning hike once, and my friend asked if I'd bought them from some fancy health food cafe. When I told her they were just oats and banana, she didn't believe me until I sent her the recipe that night. It's funny how something so simple can feel like a small victory.

Ingredients

  • Old-fashioned rolled oats: The backbone of the bars, they give you that chewy texture and hold everything together without feeling heavy.
  • Vanilla protein powder: I use whatever I have on hand, but vanilla blends in without fighting the banana.
  • Ground cinnamon: Just enough to make the kitchen smell like weekend mornings.
  • Salt: Don't skip it, it wakes up the sweetness.
  • Baking powder: Gives a little lift so they're not dense.
  • Ripe bananas: The riper the better, those brown spots mean natural sweetness and moisture.
  • Honey or pure maple syrup: I go back and forth, honey makes them a little chewier, maple adds a warmer note.
  • Unsweetened applesauce: This is the secret to keeping them soft for days without adding oil.
  • Large eggs: They bind everything and add a little protein boost.
  • Pure vanilla extract: A teaspoon goes a long way in rounding out the flavor.
  • Melted coconut oil or unsalted butter: Coconut oil keeps them dairy-free, butter makes them taste a little richer.
  • Fresh or frozen blueberries: Frozen work just as well, and you don't have to plan ahead.

Instructions

Preheat and prep your pan:
Set your oven to 350°F and line an 8x8-inch pan with parchment, letting the edges hang over like little handles. It makes lifting them out so much easier later.
Mix the dry ingredients:
Whisk the oats, protein powder, cinnamon, salt, and baking powder in a big bowl until everything looks evenly distributed.
Mash and combine the wet ingredients:
In another bowl, mash your bananas with a fork until they're smooth, then whisk in the honey, applesauce, eggs, vanilla, and melted oil. It should look creamy and smell sweet.
Bring it all together:
Pour the wet mix into the dry and stir gently until just combined, don't overwork it or they'll get tough.
Fold in the blueberries:
Add the berries last and fold them in carefully, especially if they're frozen, so they don't break apart and turn everything purple.
Spread and bake:
Press the batter evenly into your pan and bake for 28 to 32 minutes, until the edges are golden and a toothpick comes out clean. Let them cool completely before you cut, I know it's hard to wait.
Golden-brown Blueberry Banana Oatmeal Protein Bars, studded with juicy blueberries, ready to eat. Save
Golden-brown Blueberry Banana Oatmeal Protein Bars, studded with juicy blueberries, ready to eat. | ovenharmony.com

One morning my daughter grabbed two bars on her way out the door and told me later she traded one with a friend at lunch. The next week, that friend's mom texted asking for the recipe. That's when I knew these weren't just easy, they were actually good.

How to Store Them

I keep mine in a glass container on the counter for up to three days, but if you want them to last longer, the fridge works great for a week. You can even freeze them individually wrapped and pull one out the night before.

Ways to Mix It Up

Sometimes I swap the blueberries for chopped strawberries or chocolate chips when I'm feeling less virtuous. A handful of chopped walnuts or sunflower seeds adds a nice crunch, and if you're out of protein powder, oat flour works fine, you just lose a little of the protein boost.

Quick Fixes and Swaps

If you need them dairy-free, use coconut oil and check your protein powder label. If you're avoiding eggs, I've heard flax eggs work but I haven't tried it myself. You can also drizzle a little almond butter on top before baking for extra richness.

  • Use peanut butter protein powder for a PB and blueberry vibe.
  • Press a few extra berries on top before baking for a prettier look.
  • Cut them smaller if you want more portions or bigger if you need serious fuel.
Close-up of freshly baked Blueberry Banana Oatmeal Protein Bars, a healthy and tasty snack option. Save
Close-up of freshly baked Blueberry Banana Oatmeal Protein Bars, a healthy and tasty snack option. | ovenharmony.com

These bars have made my mornings quieter and my kids happier, and that's worth the 15 minutes it takes to stir them together. I hope they do the same for you.

Recipe FAQ

Can I use frozen blueberries in these bars?

Yes, frozen blueberries can be used straight from the freezer without thawing. Gently fold them into the batter to maintain their shape.

What can I substitute for protein powder?

Oat flour can replace protein powder for a non-protein version, keeping the texture hearty and dense.

How should these bars be stored?

Store in an airtight container at room temperature for up to 3 days or refrigerate for up to a week to maintain freshness.

Can I make these dairy-free?

Use dairy-free protein powder and swap butter with coconut oil to keep the bars dairy-free and equally tasty.

Is it possible to add nuts or seeds for extra crunch?

Yes, incorporating about 1/4 cup of chopped nuts or seeds adds a satisfying crunch and additional flavor.

Blueberry Banana Oatmeal Bars

Wholesome bars with blueberries, banana, oats, and protein—perfect for a healthy grab-and-go start.

Prep duration
15 min
Cook duration
30 min
Complete duration
45 min
Created by Claire Johnson

Classification Sweet Treats

Complexity Easy

Heritage American

Output 12 Portions

Dietary considerations Meat-free

Components

Dry Ingredients

01 2 cups old-fashioned rolled oats
02 1/2 cup vanilla protein powder
03 1/2 teaspoon ground cinnamon
04 1/4 teaspoon salt
05 1 teaspoon baking powder

Wet Ingredients

01 2 large ripe bananas, mashed
02 1/4 cup honey or pure maple syrup
03 1/4 cup unsweetened applesauce
04 2 large eggs
05 1 teaspoon pure vanilla extract
06 2 tablespoons melted coconut oil or unsalted butter

Mix-Ins

01 1 cup fresh or frozen blueberries (if frozen, do not thaw)

Directions

Phase 01

Preheat oven and prepare pan: Preheat oven to 350°F. Line an 8x8-inch baking pan with parchment paper, leaving an overhang for easy removal.

Phase 02

Combine dry ingredients: In a large bowl, whisk rolled oats, protein powder, cinnamon, salt, and baking powder until evenly mixed.

Phase 03

Prepare wet ingredients: In a separate bowl, mash bananas thoroughly. Add honey or maple syrup, applesauce, eggs, vanilla extract, and melted coconut oil. Whisk until smooth.

Phase 04

Mix wet and dry ingredients: Pour wet mixture into dry ingredients and stir gently until just incorporated.

Phase 05

Incorporate blueberries: Fold in blueberries carefully to avoid overmixing, preserving their integrity especially if frozen.

Phase 06

Transfer batter and bake: Spread batter evenly into the prepared pan. Bake for 28 to 32 minutes, until bars are golden and a toothpick inserted in the center comes out clean.

Phase 07

Cool and portion: Allow bars to cool completely in the pan. Using the parchment overhang, lift out and cut into 12 bars.

Necessary tools

  • Mixing bowls
  • Whisk and spatula
  • 8x8-inch baking pan
  • Parchment paper
  • Measuring cups and spoons

Allergy details

Review each component for potential allergens and consult healthcare professionals if you're unsure about ingredients.
  • Contains eggs, tree nuts/coconut (if coconut oil is used), and dairy (if butter or dairy-based protein powder is used). Some protein powders may have soy or nut traces.

Nutritional information (each portion)

These values are approximate guidelines only and shouldn't replace professional medical guidance.
  • Energy: 135
  • Fats: 3.5 g
  • Carbohydrates: 22 g
  • Proteins: 6 g