High-Protein Apple Cinnamon Swirl Loaf Recipe
This High-Protein Apple Cinnamon Swirl Loaf is warm, comforting, and packed with 30g of protein per slice. With a cozy cinnamon ribbon, tender apple bits, and a moist bakery-style crumb, this loaf feels indulgent while keeping your macros on track. Perfect for breakfast, snacks, or post-workout fuel, it’s a healthy comfort food that tastes like fall in every bite.
Ingredients
- 1 cup oat flour 100g
- ½ cup whey isolate protein powder 50g – vanilla recommended
- 1 ½ teaspoons baking powder
- ½ teaspoon baking soda
- 1 tablespoon ground cinnamon
- ¼ teaspoon salt
- 1 cup thick Greek yogurt 240g
- ½ cup unsweetened applesauce 120g
- 2 large eggs
- ½ cup liquid egg whites 120ml
- ⅓ cup sweetener 65g — allulose preferred for moisture
- 2 teaspoons vanilla extract
- 1 medium apple finely diced (about 120g)
- 1 teaspoon cinnamon for swirl
- 1 tablespoon sweetener for swirl
- 1 teaspoon butter or ½ teaspoon oil for swirl
Instructions
- Preheat your oven to 350°F (175°C) and line a loaf pan with parchment paper.
- Heat a small skillet over medium heat. Add butter, diced apple, cinnamon, and sweetener. Cook 3–5 minutes until soft, glossy, and fragrant. Remove from heat to cool.
- In a large bowl, whisk together oat flour, whey isolate, baking powder, baking soda, cinnamon, and salt.
- In another bowl, whisk Greek yogurt, applesauce, eggs, egg whites, sweetener, and vanilla until smooth.
- Use a spatula to gently fold the dry mixture into the wet mixture. Stop mixing as soon as everything is combined.
- Pour half the batter into the prepared loaf pan. Spoon half the apple cinnamon swirl mixture over top.
- Add the remaining batter, then top with the rest of the apple swirl mixture.
- Use a butter knife to gently swirl the batter in an “S” pattern for a bakery-style ribbon swirl.
- Bake for 45–55 minutes or until a toothpick inserted into the center comes out with moist crumbs but not wet batter.
- Allow the loaf to cool in the pan for at least 15–20 minutes before slicing.
- Slice into 8 thick slices and enjoy warm or chilled.
- Store leftovers in the refrigerator for up to 6 days or freeze for up to 2 months.