French Toast Casserole with overnight soaked challah, then baked to perfection and topped with fresh berries. The perfect breakfast/brunch to feed a crowd!
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In a large bowl whisk together: milk, half & half, eggs, 1/4 cup brown sugar, vanilla extract, orange zest, kosher salt, nutmeg, and 1 tsp cinnamon. Ensure all eggs are fully whisked.
Carefully pour over the top of the bread, evenly distributing over the pieces on top. Cover with aluminum foil and refrigerate overnight.
Preheat the oven to 350 degrees F. Remove bread from refrigerator.
In a small bowl combine the flour, cold butter, 1 tsp cinnamon, and 1/4 cup brown sugar. Mix with your finger tips until combined and crumbly. Sprinkle over the top of the bread.
Place in the oven and bake for 60 minutes. After 45 minutes if the top begins to burn, tent the top with some aluminum foil for the remaining duration.
Remove from oven, the top should be crisp and the middle spongey, but not wet. Top with the fresh berries and optional powdered sugar. Serve with maple syrup.
Notes
If you cannot refrigerate the bread overnight, allow minimum 20 minutes for bread to soak. (The longer the better for flavor purposes)