1-Before you start: Preheat your oven and prepare your baking dish to avoid last-minute scrambling. Gather ingredients and measure everything so the assembly goes quickly.

2-First Step: Prep and preheat
Preheat oven to 425 degrees. Butter a 13×9 inch baking pan and set it aside so it’s ready when you need it. Cut half a loaf of French bread (about 8 oz) into 1-inch cubes if you haven’t already.

3-Second Step: Make the brown sugar-butter base
Melt 1/2 cup butter in a small saucepan over medium heat. Stir in 1 cup packed brown sugar until dissolved and smooth. Take the pan off heat briefly and pour this mixture into the bottom of the buttered 13×9 inch baking pan, spreading it evenly so the caramel layer covers the whole base.

4-Third Step: Layer the bread
Place the cubed French bread evenly over the brown sugar and butter mixture. Press lightly so the cubes make good contact with the caramel base this helps the bread soak up flavor from below as it bakes.

5-Fourth Step: Whisk the custard
In a medium bowl, whisk together 6 eggs, 2 cups milk, 2 teaspoons vanilla extract, and 1 teaspoon cinnamon until smooth and blended. Taste the custard and adjust if you’d like a touch more sweetness or spice.

6-Fifth Step: Combine and top
Pour the egg and milk mixture evenly over the bread cubes, making sure all pieces are saturated. Sprinkle the remaining 1 teaspoon cinnamon and 1 tablespoon brown sugar across the top for extra color and crunch.

7-Baking:
Bake the casserole at 425 degrees for 25 to 30 minutes until the top turns golden brown and the center is set. Oven times vary; the top should be puffed and lightly crisped. Allow the dish to rest for a few minutes after removing it from the oven so it firms up slightly for cleaner slices.

8-Final Step: Serve and garnish
Dust with powdered sugar if you like, slice into squares, and serve warm. Maple syrup, fresh berries, or a dollop of yogurt are lovely accompaniments. A simple green side dressed with the balsamic vinaigrette works well for a savory contrast.