Apple Cinnamon Baked Oatmeal is hearty, healthy, delicious, and fairly adaptable to whatever ingredients you have on hand. Plus, leftovers keep well in the fridge for several days. Serve it up as a tasty start to your day or as a “breakfast-for-dinner”, along with bacon and a fruit salad.

Apple Cinnamon Baked Oatmeal

By Polly Conner
September 1, 2021

This Apple Cinnamon Baked Oatmeal is hearty, healthy, delicious, and fairly adaptable to whatever ingredients you have on hand. Plus, leftovers keep well in the fridge for several days. Serve it up as a tasty start to your day or as a “breakfast-for-dinner”, along with bacon and a fruit salad.

Apple Cinnamon Baked Oatmeal

Baked Oatmeal for the Win!

We are baked oatmeal fanatics around here, as you may know. Both my kids and Polly’s kids eat the stuff by bushels.

I find myself making the Brownie Baked Oatmeal repeatedly, while Polly probably makes the original Baked Oatmeal with Fruit recipe the most. But, all the baked oatmeal recipes on here are worth trying.

This baked apple oatmeal is one of my favorites to make in the fall though!

What’s in Apple Cinnamon Oatmeal?

This baked breakfast treat is sweet but not too sweet, autumnal (I love that word), and packed full of sneaky nutrition. You likely have all of the ingredients in your pantry! Here is what you will need to make it:

  • Oats (quick or rolled)
  • Ground flaxseed
  • Brown sugar
  • Cinnamon
  • Salt
  • Baking powder
  • Butter, melted (sub: avocado oil or melted coconut oil)
  • Eggs
  • Milk (your choice)
  • Chopped walnuts (optional)
  • 1 apple, cored and finely diced (peeled or unpeeled is fine)
  • Raisins

HOW TO FREEZE BAKED OATMEAL

We are big fan of freezer meals. In fact, we’ve built a small freezer meal empire including cookbooks1 Hour Freezer Prep, and an index of tried and true freezer meal recipes.

So it shouldn’t come as a surprise to you that we have freezer meal instructions for this recipe!

Freeze Apple Baked Oatmeal For Later: 

Put together the casserole either in one 9×13 inch casserole dish or two 8×8 inch casserole dishes (like what’s pictured in this blog post), but don’t bake it. Tightly wrap the dish in a few layers of plastic wrap or foil (or a tight-fitting lid) and freeze.


Prepare From Frozen: 

Thaw completely using one of these safe methods. Cook according to instructions.

Baked oatmeal in a freezer container
Print
Apple Cinnamon Baked Oatmeal is hearty, healthy, delicious, and fairly adaptable to whatever ingredients you have on hand. Plus, leftovers keep well in the fridge for several days. Serve it up as a tasty start to your day or as a “breakfast-for-dinner”, along with bacon and a fruit salad.

Apple Cinnamon Baked Oatmeal Recipe

  • Prep Time: 10 minutes
  • Cook Time: 20 minutes
  • Total Time: 30 minutes
  • Yield: 46 servings 1x
  • Category: Breakfast
  • Method: Baking
  • Cuisine: American

Description

This recipe is hearty, healthy, delicious, and fairly adaptable to whatever ingredients you have on hand. Plus, leftovers keep well in the fridge for several days. Serve it up as a tasty start to your day or as a “breakfast-for-dinner”, along with bacon and a fruit salad.


Ingredients

  • 2 ¾ cups oats (quick or rolled)
  • ¼ cup ground flaxseed (or substitute more oats)
  • ⅔ cup brown sugar
  • 1 teaspoon cinnamon
  • ¾ teaspoon salt
  • 1 teaspoon baking powder
  • 1/4 cup (1/2 stick) butter, melted (sub: avocado oil or melted coconut oil)
  • 2 eggs
  • 1 cup milk (your choice)
  • ½ cup chopped walnuts (optional)
  • 1 apple, cored and finely diced (peeled or unpeeled is fine)
  • ¼ cup raisins

Instructions

Make It Now:

  1. Preheat oven to 350°F. Grease a 9×13 inch casserole dish (or two 8×8 inch dishes).
  2. In a large bowl, whisk together the oats, flaxseed, brown sugar, salt, baking powder, and cinnamon.
  3. In a separate bowl, whisk together melted (and cooled) butter, eggs, and milk.
  4. Pour the wet ingredients into the dry ones and stir until combined well. Gently stir in the walnuts, apples, and raisins.
  5. Pour batter into baking dish. Bake for 20-25 minutes or until an inserted toothpick comes out clean. Serve with warm milk and a bit more brown sugar on top, if desired.

Freeze For Later: Complete recipe through Step 4. DO NOT BAKE before freezing. Wrap casserole dish tightly in a few layers of plastic wrap and one of foil and place in the back of the freezer.

Prepare From Frozen: Thaw in the fridge for 24 hours and bake according to directions. If baking from frozen, cover oatmeal with foil and plan to bake longer, until the middle is cooked through. If cooking directly from frozen, the USDA states that, “it will take approximately one and a half times as long to cook.”

Apple cinnamon baked oatmeal in a white bowl

Want More Easy Breakfast Ideas?

Check out these 10 Make Ahead Breakfasts that are perfect for back to school.

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8 replies
  1. Dianna says:

    Besides replacing butter with olive or coconut oil, any suggestions on a replacement for the milk? I’m going dairy free 🙁

    Reply
  2. Brianna says:

    I made this a few months ago as a freezer breakfast option since we were expecting our first baby. I did bake it first and froze in individual servings so it would be easier to just pop a square in the microwave for simple breakfasts. I did reduce the sugar to 1/3 cup and used olive oil in place of the butter. It tastes great and really holds up so well to the freezing! Thank you!

    Reply
    • Rachel says:

      Thanks for the feedback, Brianna. Love your ideas for healthy tweaks. I’ve used coconut oil and avocado oil in place of the butter and it’s delicious, too.

      Reply
  3. Ali Barnes says:

    I made this for church. Several people asked for the recipe. It was a great thing to make for a large group and it went over well with all age groups! Thanks for sharing!

    Reply