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French Toast Casserole: The Ultimate Make-Ahead Breakfast Bake


  • Author: WAFA LI

Ingredients

(Serves 8–10)

Base:
• 8 cups day-old bread, cut into 1″ cubes
 → Classic: brioche, challah, or French bread
 → Keto: low-carb bread (e.g., Julian Bakery, Base Culture) or almond flour “croutons” (see note)

Custard:
• 6 large eggs
• 2 cups unsweetened almond milk or whole milk
• ¼ cup brown sugar–style monk fruit blend (e.g., Lakanto Golden—adds caramel depth!)
• 2 tbsp melted butter or coconut oil
• 1 tbsp vanilla extract
• 1½ tsp ground cinnamon
• ¼ tsp nutmeg
• Pinch of sea salt

Swirl & Topping (The Magic):
• ¼ cup brown sugar–style monk fruit blend
• 1½ tsp cinnamon
• 3 tbsp cold butter, cut into small pieces
• Optional: ½ cup chopped pecans or walnuts; 1 tsp orange zest (brightens—like your Lemon-Almond Biscotti)


🌰 Keto Almond Flour “Croutons” (No Bread Needed!)

→ Pulse 2 cups blanched almond flour, 2 tbsp coconut flour, 1 tsp baking powder, ¼ tsp salt, 2 tbsp butter, 1 egg, and 1 tbsp water in food processor until crumbly. Press into a loaf pan; bake at 350°F for 20 min. Cool, then cube and dry-toast 10 min at 300°F. Use in place of bread.


Instructions

  1. Prep bread: Spread cubes in a greased 9×13″ baking dish (or individual ramekins).
  2. Make custard: Whisk eggs, milk, sweetener, melted butter, vanilla, spices, and salt until smooth. Pour evenly over bread. Press down gently to soak.
  3. Swirl topping: Mix sweetener and cinnamon. Scatter over casserole. Dot with cold butter (and nuts, if using).
  4. Rest (key for absorption!):
    Overnight (best): Cover; refrigerate 8+ hours (up to 24 hrs).
    Same-day: Let sit 30–45 min at room temp.
  5. Bake: 350°F (175°C) for 45–55 min—until puffed, golden, and set in center (internal temp 160°F).
  6. Rest 10 min. Serve warm with a dusting of powdered monk fruit blend or a drizzle of sugar-free maple syrup.

⏱️ TIME & NUTRITION

Prep: 15 min (+ rest time) | Cook: 50 min | Total: 1 hr 5 min (same-day)
Classic (brioche): 340 kcal | 32g net carbs | 16g fat | 12g protein
Keto (almond “croutons”): 240 kcal | 4g net carbs | 20g fat | 10g protein