I love that this Overnight Baked Apple Oatmeal recipe can be prepared the night before. Crowned with a crispy brown sugar streusel, it makes for an irresistibly easy breakfast!

a spoon in a white square baking dish of baked apple oatmeal

Easy Overnight Baked Oatmeal Recipe

When the temps start to fall, my breakfast thoughts turn to a bowl of warm, hearty oatmeal. And of course, ANYTHING that uses these beautiful fall Minnesota apples. This Easy Overnight Baked Apple Oatmeal is the perfect solution!

This comfy pan of oatmeal includes both steel cut oats and old fashioned oats, is generous with chunks of fresh sauteed cinnamon apples, and is topped with a crispy brown sugar streusel. It’s apple oatmeal heaven!

And what’s even better is that this baked oatmeal recipe can be prepared the night before. Which is great for an easy breakfast the following morning, especially when you have guests staying with you. What a treat it is to wake up to a fabulous dish that only needs to be popped into a hot oven!

Recipe Ingredients

This recipe is broken down into 3 easy parts, with common ingredients. Here’s what you’ll need:

FOR THE SAUTEED APPLES

  • Butter
  • Apples – Use a tart/crisp variety that will hold up well when baked, such as Haralson, Honeycrisp, or Zestar!
  • Brown sugar
  • Cinnamon
  • Apple cider

FOR THE OATMEAL

  • Butter, melted
  • Milk
  • Applesauce
  • Eggs
  • Brown sugar
  • Cinnamon
  • Nutmeg
  • Kosher salt
  • Vanilla extract
  • Old fashioned oats
  • Steel cut oats

FOR THE STREUSEL

  • Flour
  • Old fashioned oats
  • Brown sugar
  • Kosher salt
  • Baking powder
  • Butter, at room temperature, cut into 1/2” pieces, (do not melt)

How to Make Baked Oatmeal With Apples

overnight baked apple oatmeal in a square white baking dish

Most years I wait to bake with apples until after we pick Haralsons” (my very favorite apple!) at a local orchard. But the apples weren’t quite ready to pick yet. So I settled on another crisp and tart (and a bit sweeter) variety that was also developed right here at the University of Minnesota, the “Zestar!”.

The apple oatmeal is absolutely lovely spooned into a deep bowl with a bit of warmed milk. Really, could a cool fall morning’s breakfast get any lovelier than this?!

And did you catch the last part of this oatmeal’s title? The “crunchy brown sugar streusel” part? It’s a golden crown of crispy yum, all sweet and salty on top, and so utterly delicious. I like to think of it as a thin layer of dessert on my breakfast. ;)

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baked oatmeal with apples and a crunchy streusel topping, in a square white baking dish

Overnight Baked Apple Oatmeal with Crunchy Brown Sugar Streusel

Yield: 8 to 10 servings
Cook Time: 35 minutes
Total Time: 35 minutes

I love that this Overnight Baked Apple Oatmeal can be prepared the night before. And it’s crowned with crunchy goodness, sweet and salty and utterly delicious!

Ingredients

for the sauteed apples:

  • 2 tablespoons unsalted butter
  • 4 cups peeled and chopped apples - Use a tart/crisp variety that will hold up well when baked, such as Haralson, Honeycrisp, or Zestar!
  • 2 tablespoons brown sugar
  • 1 teaspoon cinnamon
  • 1/3 cups fresh pressed apple cider

for the oatmeal:

  • 2 tablespoons unsalted butter, melted
  • 2 cups milk
  • 1 cups unsweetened applesauce
  • 2 large eggs
  • 3/4 cup brown sugar
  • 1 tablespoon cinnamon
  • 1/2 teaspoon nutmeg
  • 1/2 teaspoon kosher salt
  • 2 teaspoon pure vanilla extract
  • 3 cups old fashioned oats
  • 1 cups steel cut oats

for the crunchy brown sugar streusel:

  • 1/3 cup all-purpose flour
  • 1/3 cup old fashioned oats
  • 1/3 cup brown sugar
  • 1/2 teaspoon kosher salt
  • 1/2 teaspoon baking powder
  • 4 tablespoons unsalted butter, at room temperature, cut into 1/2” pieces, (do not melt)

Instructions

  1. Butter a deep 9'' square baking dish or a similar dish that holds about 2 quarts. Set aside.
for the sauteed apples:
  1. In a large skillet over medium heat, melt the butter. Add apples, brown sugar, and cinnamon, and stir to coat. Pour in apple cider and cook until apples are soft and cider has mostly reduced and disappeared from the pan. This should take 10 to 15 minutes. Remove pan from heat and set aside.
for the oatmeal:
  1. In a large bowl, whisk together butter, milk, applesauce, eggs, brown sugar, cinnamon, nutmeg, salt, and vanilla. Stir in the sauteed apples, then the old fashioned oats and steel cut oats.
  2. Transfer to buttered dish and spread oatmeal mixture evenly. Cover tightly with plastic wrap, pressing the wrap directly onto the surface of the oatmeal mixture. Refrigerate overnight.
for the crunchy brown sugar streusel:
  1. In a medium bowl, use a fork to stir together the flour, oats, brown sugar, salt, and baking powder. Cut in the butter with the same fork until there are large pea-sized crumbs. This can be prepared the night before, and covered, but don't add it to the oatmeal mixture until you are ready to bake it in the morning.
  2. The next morning, preheat oven to 375° F. Unwrap the oatmeal mixture and top it with the prepared streusel. Bake for 30 to 35 minutes, or until oatmeal is thoroughly hot and the streusel is golden brown.
  3. If you want the streusel to be more browned and crunchy, simply place under the broiler for a couple minutes. Serve hot with warmed milk or cream, and extra brown sugar if desired.

Notes

Heavily adapted from King Arthur Flour Whole Grain Baking.

Nutrition Information:
Yield: 10 Serving Size: 1
Amount Per Serving: Calories: 425Total Fat: 14gSaturated Fat: 7gTrans Fat: 0gUnsaturated Fat: 6gCholesterol: 66mgSodium: 308mgCarbohydrates: 67gFiber: 6gSugar: 30gProtein: 9g

Nutrition information is automatically calculated by Nutritionix. I am not a nutritionist and cannot guarantee accuracy. If your health depends on nutrition information, please calculate again with your own favorite calculator.

Did you make this recipe?

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baked oatmeal with apples and a crunchy streusel topping, in a square white baking dish

This post was originally published in 2013 and updated in 2021.