This Protein Banana Bread is a moist, tender loaf that balances comforting banana flavor with an extra boost of protein. It’s built on a base of rolled oats and your choice of protein powder, and uses Greek yogurt and extra egg whites for structure and moisture. The loaf is lightly sweet, slightly dense, and perfect for breakfast, a post-workout snack, or a portable treat. Below you’ll find an approachable method, ingredient notes, tips for success, and clear, step-by-step directions so your loaf turns out consistently delicious every time.

Why you’ll love this loaf

Think of this as the familiar banana bread you grew up with, but more nourishing. The rolled oats provide hearty texture and wholesome fiber while the protein powder lifts the macronutrient profile so one slice can help you stay full longer. The use of plain nonfat Greek yogurt keeps the crumb tender without adding excess fat, and avocado oil brings a neutral richness that won’t overpower the banana flavor.

Ingredient notes and swaps

2 cups rolled oats — These act as the flour base. Use old-fashioned rolled oats for the best texture. If you prefer a finer crumb, pulse the oats in a blender or food processor until they reach a coarse flour consistency.
2/3 cup protein powder of choice — Pick a flavor that complements bananas, such as vanilla or unflavored. Whey, plant-based, or other protein powders work; their protein content will subtly alter texture but won’t change the overall method.
5 Tbsp sugar-free sweetener or brown sugar, or cane sugar — Use whichever sweetener you prefer. For this recipe, 5 tablespoons of brown sugar or cane sugar will give a classic sweetness and slight caramel notes, while a sugar-free sweetener keeps the carbs lower. If using granulated sugar alternatives, measure by volume as listed.
2 tsp baking powder — This is the primary leavening. Make sure it is fresh for a good rise.
1 tsp ground cinnamon (optional) — A warm note that pairs beautifully with banana.
½ tsp sea salt — Enhances flavor and balances sweetness.
4 large ripe bananas, mashed (2 cups) — Very ripe bananas with brown speckles are best for sweetness and flavor. Mash until mostly smooth.
5 ounces plain nonfat Greek yogurt — Adds moisture, tang, and protein to the loaf. If you prefer a whole-milk version, you can use plain Greek yogurt with the same amount.
2 large eggs — Provide structure and richness.
1/2 cup egg whites — Extra protein and lift without adding fat. Use carton egg whites or separate from fresh eggs—measure by volume.
5 Tbsp avocado oil — Neutral-flavored oil that keeps the bread moist. You can substitute a mild-flavored vegetable oil if needed.
2 tsp pure vanilla extract — Enhances the overall aroma and brings out the banana flavor.

Equipment

9×5-inch loaf pan (or similar)
Mixing bowls
Whisk and rubber spatula
Measuring cups and spoons
Fork or potato masher for the bananas
Optional: blender or food processor if you want to grind the oats into a finer flour

Prep tips before baking

Preheat your oven to 350°F (177°C) so it’s ready when your batter is mixed.
Grease and line the loaf pan with parchment for easy removal. Lightly oiling the pan and placing a parchment sling will give a clean, intact loaf.
If your bananas are not quite ripe, you can roast them for extra sweetness—wrap in foil and bake at 375°F for 20 minutes, then cool and mash. Measure 2 cups mashed.
If you prefer a more even crumb, pulse the rolled oats into a coarse flour before mixing. Otherwise, leave them whole for texture.

Step-by-step directions

Preheat the oven to 350°F (177°C). Prepare a 9×5-inch loaf pan by lightly greasing it and lining it with parchment paper, leaving an overhang on two sides to lift the bread out once it’s cool.
In a large mixing bowl, combine the dry ingredients: 2 cups rolled oats, 2/3 cup protein powder of choice, 5 tablespoons sugar-free sweetener or brown sugar or cane sugar, 2 teaspoons baking powder, 1 teaspoon ground cinnamon (if using), and 1/2 teaspoon sea salt. Whisk these together until evenly distributed.
In a separate bowl, mash 4 large ripe bananas until you have about 2 cups of mashed banana. A few small lumps are fine; you want a mostly smooth texture that still gives banana bite.
Add the wet ingredients to the mashed bananas: stir in 5 ounces plain nonfat Greek yogurt, 2 large eggs, 1/2 cup egg whites, 5 tablespoons avocado oil, and 2 teaspoons pure vanilla extract. Whisk or stir until the mixture is uniform and slightly glossy.
Pour the wet banana mixture into the bowl with the dry ingredients. Use a rubber spatula to fold the ingredients together gently but thoroughly. Mix only until no large pockets of dry oats remain; overmixing can lead to a denser loaf.
Scrape the batter into the prepared loaf pan and spread it evenly. Tap the pan gently on the counter once or twice to release any large air bubbles and to settle the batter.
Place the pan in the preheated oven and bake for 45–55 minutes, or until the top is golden brown and a toothpick inserted into the center comes out with a few moist crumbs but not wet batter. Ovens vary, so begin checking at 45 minutes.
Once done, remove the loaf from the oven and let it cool in the pan for 10–15 minutes. Then use the parchment sling to lift the bread onto a wire rack to cool completely or until warm to the touch. Cooling fully makes slicing cleaner, but this loaf can be enjoyed warm.
Slice and serve. Store any leftovers wrapped tightly at room temperature for up to two days or refrigerated for up to five days. For longer storage, freeze individual slices wrapped in plastic and placed in a freezer-safe bag for up to three months.

Serving suggestions

Serve a slice plain, spread with a thin layer of nut butter, or top with a dollop of Greek yogurt and a sprinkle of cinnamon. It pairs well with coffee, tea, or a smoothie for an easy, satisfying breakfast. If you like texture, fold in a handful of chopped nuts or cacao nibs to the batter before baking.

Variations and add-ins

Chocolate chip: Fold in 1/3 to 1/2 cup dark chocolate chips (or sugar-free chips) to the batter.
Nutty: Add 1/2 cup chopped walnuts, pecans, or almonds for crunch.
Berry boost: Fold in 1/2 cup fresh or frozen blueberries for a fruity twist—toss frozen berries with a teaspoon of flour so they don’t sink.
Spiced: Increase cinnamon to 2 teaspoons and add 1/4 teaspoon ground nutmeg for deeper spice notes.

Troubleshooting

If the loaf is too dense: Be sure you measured the wet ingredients correctly and avoided overmixing. Slightly overripe bananas contribute sweetness but can increase moisture—pulse the oats finer if you prefer a more cake-like crumb.
If it’s too crumbly: Slightly underbaking or too much protein powder without adequate moisture can cause crumbliness. Ensure you include the full 5 ounces of Greek yogurt and measure the protein powder by the recipe amount.
If the top browns too quickly: Tent the loaf loosely with foil for the last 10–15 minutes of baking.

Nutritional notes

The exact nutrition will vary depending on the protein powder and sweetener used, but this loaf is designed to offer more protein than a traditional banana bread thanks to the protein powder, Greek yogurt, and added egg whites. Swapping sugars for a sugar-free sweetener reduces the carbohydrate content, while using brown or cane sugar gives a more traditional flavor profile.

Final thoughts

This Protein Banana Bread is reliable, adaptable, and approachable. The combination of rolled oats and protein powder provides a satisfying slice that works for breakfast, snacks, or a quick bite after exercise. Follow the step-by-step directions above and experiment with add-ins to make it your own. Happy baking—and enjoy a wholesome slice soon!

Protein Banana Bread

A moist, protein-packed banana bread made with oats and protein powder for a healthier twist on classic banana loaf.

Print Recipe Pin Recipe

Prep Time 15

Cook Time 50

Total Time 1 5

Servings: 8 slices

Ingredients Equipment Method Notes

Ingredients

2 cups rolled oats
2/3 cup protein powder of choice
5 Tbsp sugar-free sweetener or brown sugar or cane sugar
2 tsp baking powder
1 tsp ground cinnamon optional
1/2 tsp sea salt
4 large ripe bananas mashed (about 2 cups)
5 ounces plain nonfat Greek yogurt
2 large eggs
1/2 cup egg whites
5 Tbsp avocado oil
2 tsp pure vanilla extract

Equipment

9 x 5-inch loaf pan
Parchment Paper
High-powered blender
Large mixing bowl
Spatula
Measuring cups and spoons
digital thermometer (optional)

Method

Preheat the oven to 350°F (175°C). Line a 9 x 5 inch loaf pan with parchment paper.
Process the rolled oats in a high-powered blender until they form a fine flour, about 60 seconds.
Add the protein powder, sweetener (or brown/cane sugar), baking powder, cinnamon (if using), and sea salt to the oat flour and blend briefly until evenly combined.
In a large bowl, mash the ripe bananas until smooth (about 2 cups). Stir in the Greek yogurt, eggs, egg whites, avocado oil, and vanilla until well combined.
Pour the dry mixture into the wet ingredients and fold together until a thick, even batter forms.
Transfer the batter to the prepared loaf pan and smooth the top. Optionally sprinkle with chocolate chips if desired.
Cover the pan loosely with aluminum foil to allow room for rising and bake on the center rack for 40 minutes.
Remove the foil and continue baking another 10 to 20 minutes, until a skewer comes out clean or the internal temperature reaches 190–205°F (use a digital thermometer inserted into the center).
Let the loaf cool to room temperature in the pan before removing, slicing, and serving.