- 1 serving cooking spray (such as Pam®)
- 5 cups cubed bread
- 4 eggs
- 1 1/2 cups milk
- 1/4 cup granular sucralose sweetener (such as Splenda®), divided
- 2 teaspoons ground cinnamon, divided
- 1 teaspoon vanilla extract
- Preheat oven to 350 degrees F (175 degrees C). Spray a 9×13-inch baking dish with cooking spray.
- Line bottom of prepared baking dish with bread cubes. Beat eggs, milk, 2 tablespoons sweetener, 1 teaspoon cinnamon, and vanilla extract together in a bowl; pour mixture over bread cubes. Let stand 10 minutes (or refrigerate up to overnight if desired).
- Combine remaining 2 tablespoons sweetener with remaining 1 teaspoon cinnamon; sprinkle mixture over the casserole.
- Bake in the preheated oven until casserole is set and topping is crunchy, 30 to 40 minutes.