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Apple French Toast Casserole Bake
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Apple French Toast Casserole

This Apple French Toast Casserole Bake is loaded with chunks of apple, buttery and soft croissants, and warm cinnamon spice, topped with a simple streusel oat topping. It combines all of the best flavors of fall, for the perfect overnight breakfast casserole.
Prep Time15 minutes
Cook Time45 minutes
Resting Time8 hours
Total Time9 hours
Course: Breakfast, Brunch
Cuisine: American
Keyword: apples, breakfast, cinnamon, eggs, french toast
Servings: 10

Ingredients

  • 1 1/2 cup milk
  • 6 eggs
  • 2 tbsp maple syrup
  • 1 tsp vanilla extract
  • 1/2 tsp sea salt
  • 1 1/2 tsp cinnamon
  • 2 large apples (about 3 cups chopped)
  • 8 large croissants (about 12 cups)

Cinnamon Oat Streusel Topping

  • 3/4 cup oat flour (see note)
  • 3/4 cup brown sugar
  • 1 tsp cinnamon
  • 1 1/2 tsp pie spice (apple or pumpkin pie spice)
  • 1/2 cup cold butter (cubed)

Instructions

  • Grease a 9 x 13 inch casserole dish.
  • Prepare croissants by tearing/cutting each croissant into large chunks (I cut each into about thirds). Set aside.
  • In a large bowl, whisk first 6 ingredients (everything but apples and croissants) to combine. Stir in apples and croissants. Transfer to prepared casserole dish, and cover tightly with foil.
  • Refrigerate overnight (or at least 2 hours), until egg custard is absorbed.
  • When ready to bake, preheat oven to 375. Remove casserole dish from refrigerator and let sit at room temperature while oven preheats.
  • Bake covered 25 minutes.
  • Remove casserole from oven and sprinkle topping evenly over top. Return to oven, and bake uncovered for an additional 20 - 25 minutes, until custard is set and top is golden brown and toasty.
  • Serve topped with extra syrup, powdered sugar, and/or whipped cream, if desired.

For the Cinnamon Oat Streusel Topping

  • Either while the casserole bakes or the night before, prepare the streusel topping by combining dry ingredients in a medium bowl. Add butter, and use a fork, pastry cutter to combine butter and dry ingredients into a crumble.
  • Refrigerate until ready to use.

Notes

To make the oat flour add oats to a food processor or blender, pulse until blended into a smooth flour-like consistency.
You can also substitute regular, all purpose flour if desired.

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