High-Protein French Toast Casserole
Warm • Custardy • Meal-Prep Friendly • Packed with Protein
This High-Protein French Toast Casserole tastes like classic French toast crossed with baked bread pudding — soft in the center, lightly crisp on top, and loaded with cinnamon flavor. The difference? It’s made with Greek yogurt, eggs, and protein-rich bread so each serving keeps you full for hours.
Perfect for breakfast meal prep, brunch, or a cozy weekend breakfast.
Recipe Overview
Servings: 6
Prep Time: 10 minutes
Bake Time: 35–40 minutes
Total Time: ~50 minutes
Diet: High-Protein | Lower Sugar
Ingredients
1 loaf high-protein or whole grain bread, cut into cubes (about 8 cups)
6 large eggs
1 cup plain Greek yogurt
1 cup unsweetened milk of choice
1 scoop vanilla protein powder
1/4 cup maple syrup or sugar-free syrup
1 tsp vanilla extract
1 tsp cinnamon
1/4 tsp nutmeg
1/4 tsp salt
Optional Mix-Ins:
1/2 cup blueberries or strawberries
1/4 cup chopped pecans or walnuts
1/4 cup sugar-free chocolate chips
Optional Topping:
Extra Greek yogurt, berries, or sugar-free syrup
Why This Recipe Works
Greek Yogurt
Adds creaminess and extra protein without making the casserole heavy.
Eggs
Create the custard base and help the casserole hold together.
Protein Powder
Boosts protein while adding vanilla sweetness.
Bread
Soaks up the custard and creates the classic soft French toast texture.
Cinnamon & Vanilla
Give the casserole that cozy, bakery-style flavor.
Step-by-Step Instructions
Step 1: Prep the Dish
Preheat oven to 350°F (175°C).
Lightly grease a 9×13-inch baking dish.
Spread bread cubes evenly in the dish.
If using berries or nuts, scatter them between the bread pieces.
Step 2: Make the Custard
In a large bowl, whisk together:
- Eggs
- Greek yogurt
- Milk
- Protein powder
- Maple syrup or sugar-free syrup
- Vanilla
- Cinnamon
- Nutmeg
- Salt
Whisk until completely smooth.
Step 3: Assemble
Pour the custard evenly over the bread cubes.
Press the bread gently so everything is coated.
Let sit for 10 minutes so the bread absorbs the mixture.
For best results, you can also refrigerate overnight and bake the next morning.
Step 4: Bake
Bake uncovered for 35–40 minutes until:
- Top is lightly golden
- Center is set
- Edges are slightly crisp
Let cool 5–10 minutes before serving.
Texture & Flavor
Top: Lightly crisp and golden
Inside: Soft, custardy, and fluffy
Flavor: Sweet cinnamon vanilla with rich French toast taste
Nutrition (Approximate Per Serving)
Calories: 250–320
Protein: 20–25g
Carbs: 18–25g
Fat: 8–10g
Depends on bread and protein powder used.
Flavor Variations
Berry Cheesecake Version
Add blueberries and swirl in extra Greek yogurt.
Apple Cinnamon
Add diced apples and extra cinnamon.
Chocolate Chip
Mix in sugar-free chocolate chips.
Banana Bread Style
Add sliced banana and chopped walnuts.
Meal Prep & Storage
Refrigerator: Up to 4 days
Freezer: Up to 2 months
Reheat individual slices in microwave for 30–45 seconds.
Pro Tips
• Use slightly stale bread for best texture.
• Do not skip resting time before baking.
• If top browns too quickly, cover loosely with foil.
• For extra protein, serve with more Greek yogurt.
Final Thoughts
This High-Protein French Toast Casserole gives you everything you love about French toast — warm cinnamon flavor, soft texture, and comfort-food vibes — while adding enough protein to make it a satisfying breakfast instead of just a sweet treat.
