High-Protein Cinnamon Swirl Coffee Cake

Featured in: Warm Drinks & Mug-Comfort Sips

These wholesome baked oats combine the comfort of classic coffee cake with a protein boost. Rolled oats are blended with Greek yogurt, eggs, and protein powder, then layered with a brown sugar cinnamon crumble that creates beautiful swirls throughout. The result is a warm, satisfying dish that delivers 15 grams of protein per serving while maintaining the beloved flavors of cinnamon-spiced treats.

Perfect for meal prep or busy mornings, these oats bake in just 30 minutes and can be customized with nuts, fresh fruit, or your preferred milk. The texture is perfectly balanced—creamy underneath, crispy on top, with ribbons of sweet cinnamon running through each bite.

Updated on Sun, 08 Feb 2026 19:08:31 GMT
Freshly baked High-Protein Cinnamon Swirl Coffee Cake Oats in a glass dish, showcasing golden crumble topping and warm marbled layers. Save to Pinterest
Freshly baked High-Protein Cinnamon Swirl Coffee Cake Oats in a glass dish, showcasing golden crumble topping and warm marbled layers. | coralkettle.com

Start your morning with these High-Protein Cinnamon Swirl Coffee Cake Oats. This wholesome baked oats dish is inspired by classic coffee cake, featuring a cinnamon swirl and crumble for extra flavor and texture. Packed with protein, it's the perfect choice for a nutritious breakfast or a post-workout snack.

Freshly baked High-Protein Cinnamon Swirl Coffee Cake Oats in a glass dish, showcasing golden crumble topping and warm marbled layers. Save to Pinterest
Freshly baked High-Protein Cinnamon Swirl Coffee Cake Oats in a glass dish, showcasing golden crumble topping and warm marbled layers. | coralkettle.com

The combination of Greek yogurt and protein powder gives this dish a boost of nutrition while maintaining a moist, cake-like consistency. The cinnamon crumble provides a sweet contrast that makes every bite feel like a treat.

Ingredients

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  • Oat Base: 2 cups rolled oats, 1 cup unsweetened almond milk (or milk of choice), 2 large eggs, 1 cup plain Greek yogurt (nonfat or 2%), 1/4 cup vanilla or unflavored protein powder, 1/4 cup maple syrup or honey, 1 tsp vanilla extract, 1 tsp baking powder, 1/4 tsp salt.
  • Cinnamon Swirl & Crumble: 1/3 cup brown sugar or coconut sugar, 2 tsp ground cinnamon, 2 tbsp melted unsalted butter or coconut oil, 2 tbsp all-purpose flour or oat flour, pinch of salt.

Instructions

Step 1
Preheat the oven to 350°F (175°C). Grease an 8x8-inch (20x20 cm) baking dish.
Step 2
In a large bowl, mix rolled oats, almond milk, eggs, Greek yogurt, protein powder, maple syrup, vanilla extract, baking powder, and salt until well combined.
Step 3
In a separate small bowl, stir together brown sugar, cinnamon, melted butter, flour, and a pinch of salt to form the crumble.
Step 4
Pour half of the oat mixture into the prepared baking dish. Sprinkle half of the cinnamon crumble evenly over the oats.
Step 5
Pour the remaining oat mixture on top and finish with the rest of the cinnamon crumble.
Step 6
Use a knife to gently swirl the crumble into the oats for a marbled effect.
Step 7
Bake for 30–35 minutes, or until the top is golden and the center is set.
Step 8
Allow to cool for 10 minutes before slicing and serving.

Zusatztipps für die Zubereitung

For the best texture, ensure you use a whisk or spatula to combine the oat base ingredients thoroughly. Using an 8x8-inch baking dish is essential to achieve the correct height and bake time.

Varianten und Anpassungen

For a vegan version, use flax eggs and plant-based yogurt. You can also add chopped nuts or diced apples to the oat base for more texture, or use certified gluten-free oats and oat flour to avoid gluten.

Serviervorschläge

Serve these baked oats warm with a dollop of Greek yogurt or a drizzle of nut butter. They also pair well with a cup of coffee or tea for a complete breakfast experience.

A warm slice of High-Protein Cinnamon Swirl Coffee Cake Oats served with Greek yogurt, perfect for a wholesome breakfast. Save to Pinterest
A warm slice of High-Protein Cinnamon Swirl Coffee Cake Oats served with Greek yogurt, perfect for a wholesome breakfast. | coralkettle.com

Enjoy this high-protein twist on a breakfast classic that provides a balance of carbohydrates, healthy fats, and 15 grams of protein per serving.

Recipe Q&A

Can I make these baked oats ahead of time?

Yes, these baked oats store beautifully in the refrigerator for up to 5 days. Simply reheat individual portions in the microwave for 30-60 seconds or enjoy cold. They also freeze well for up to 3 months—wrap individual slices tightly and thaw overnight before serving.

What type of protein powder works best?

Vanilla or unflavored whey or casein protein powder blends seamlessly into the oat mixture. Plant-based options like pea protein work too, though they may create a slightly denser texture. Avoid flavored varieties that might clash with the cinnamon swirl.

Can I substitute the Greek yogurt?

Greek yogurt provides moisture and protein, but you can use plain regular yogurt, dairy-free yogurt alternatives, or even cottage cheese blended until smooth. For a lower-fat version, non-fat Greek yogurt works perfectly without sacrificing texture.

How do I get the best cinnamon swirl effect?

After layering the oats and crumble, use a butter knife to gently cut through the mixture in a circular or zigzag motion. Don't over-swirl—just a few passes will create beautiful marble patterns. The crumble naturally sinks slightly during baking, enhancing the swirled appearance.

What milk alternatives can I use?

Unsweetened almond milk is suggested, but oat milk, soy milk, cow's milk, or cashew milk all work well. Keep in mind that different milks may slightly affect the final texture and sweetness level. Choose an unsweetened variety to control the sugar content.

Can I reduce the sugar content?

The maple syrup and brown sugar provide both sweetness and moisture. You can reduce the maple syrup to 2 tablespoons and use a granulated monk fruit blend in the crumble. Keep in mind that this may affect the browning and texture slightly.

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High-Protein Cinnamon Swirl Coffee Cake

Baked oats with cinnamon swirl and protein-packed ingredients for a nutritious breakfast.

Prep Time
10 minutes
Cook Time
32 minutes
Overall Time
42 minutes
Created by Madison Perry


Skill Level Easy

Cuisine Type American

Makes 4 Portion Size

Dietary Details Vegetarian Friendly

Ingredient List

Oat Base

01 2 cups rolled oats
02 1 cup unsweetened almond milk
03 2 large eggs
04 1 cup plain Greek yogurt
05 1/4 cup vanilla or unflavored protein powder
06 1/4 cup maple syrup or honey
07 1 teaspoon vanilla extract
08 1 teaspoon baking powder
09 1/4 teaspoon salt

Cinnamon Swirl and Crumble

01 1/3 cup brown sugar or coconut sugar
02 2 teaspoons ground cinnamon
03 2 tablespoons melted unsalted butter or coconut oil
04 2 tablespoons all-purpose flour or oat flour
05 Pinch of salt

Directions

Step 01

Prepare Baking Vessel: Preheat oven to 350°F. Grease an 8x8-inch baking dish with butter or cooking spray.

Step 02

Combine Oat Base: In a large mixing bowl, combine rolled oats, almond milk, eggs, Greek yogurt, protein powder, maple syrup, vanilla extract, baking powder, and salt. Stir until fully incorporated.

Step 03

Prepare Cinnamon Crumble: In a separate small bowl, mix brown sugar, ground cinnamon, melted butter, flour, and salt until a crumbly texture forms.

Step 04

Layer Base and Crumble: Pour half of the oat mixture into the prepared baking dish. Distribute half of the cinnamon crumble evenly across the oats.

Step 05

Complete Layering: Pour the remaining oat mixture over the crumble layer. Top with the remaining cinnamon crumble.

Step 06

Create Swirl Pattern: Using a knife, gently swirl through the crumble and oat mixture to create a marbled effect throughout.

Step 07

Bake Until Set: Bake for 30 to 35 minutes until the top is golden brown and the center is firm when tested with a knife.

Step 08

Cool and Serve: Allow to cool for 10 minutes before cutting into portions and serving.

Equipment List

  • Mixing bowls
  • 8x8-inch baking dish
  • Whisk
  • Spoon or spatula
  • Oven

Allergy Advisory

Examine all ingredients for allergens and talk to your healthcare provider with any concerns.
  • Contains eggs
  • Contains dairy from Greek yogurt
  • Contains tree nuts if using almond milk
  • Contains gluten if using regular all-purpose flour

Nutritional Info (Each Serving)

The nutrition details are for reference only and shouldn't replace advice from a doctor.
  • Caloric Value: 245
  • Fats: 6 g
  • Carbohydrates: 33 g
  • Proteins: 15 g

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