Breakfast
Apple, Cinnamon & Walnut Baked Oatmeal
Soft baked oats dotted with apples and walnuts, lightly sweetened with maple syrup and cut into easy-to-reheat breakfast portions rather than served as another cold overnight jar.
Inspired by Warm baked oatmeal breakfast squares
Prep
10 min
Cook
35 min
Serves
6 servings
Difficulty
Easy
Pantry match
Uses the current servings and temporary recipe changes.
Missing 11 ingredients
- • 3 cups certified gluten-free old-fashioned rolled oats
- • 2 medium apples, cored and diced
- • 2 cups milk
- • 2 large eggs
- • 1/2 cup chopped walnuts
- • 3 tablespoons maple syrup
- • 1 teaspoon vanilla extract
- • 2 teaspoons ground cinnamon
- • 1 teaspoon baking powder
- • 1/4 teaspoon kosher salt
- • 1 teaspoon olive oil, for the dish
View ingredient-by-ingredient match
- 3 cups certified gluten-free old-fashioned rolled oatsMissing
- 2 medium apples, cored and dicedMissing
- 2 cups milkMissing
- 2 large eggsMissing
- 1/2 cup chopped walnutsMissing
- 3 tablespoons maple syrupMissing
- 1 teaspoon vanilla extractMissing
- 2 teaspoons ground cinnamonMissing
- 1 teaspoon baking powderMissing
- 1/4 teaspoon kosher saltMissing
- 1 teaspoon olive oil, for the dishMissing
Cook smarter
- Read the full method once before starting.
- Prep ingredients first for a smoother cook.
- Use the print button for a cleaner kitchen copy.
Guided cooking
Cook one clear step at a time
Your place is saved on this device.
Method
Recipe notes
Rolled oats hold their texture through baking and reheating. Small apple pieces soften during the bake; large chunks stay crunchy and can make portions crumble when lifted from the dish.
Planning, storage, and serving
Storage and reheating
Cover and refrigerate within two hours, keeping portions up to 4 days, or freeze individually for up to 2 months. Reheat a refrigerated portion with a splash of milk until steaming throughout.
Make-ahead tips
Bake once and divide into six breakfast portions. Store slices separately so weekday reheating does not repeatedly warm the whole pan; add extra milk only at serving.
What to serve with it
- - Plain Greek yogurt
- - A boiled egg
- - Fresh pear slices
Equipment needed
- - 8-inch square baking dish
- - Two mixing bowls
- - Whisk and measuring cups
Difficulty explained
Everything is mixed and baked in one dish; the main judgment is removing it when the center is set but the oats are still moist.
Recipe calculator
Nutrition facts
Updating nutrition…
Alternatives
Apply a reviewed substitution to this temporary working copy. The published recipe stays unchanged.
Browse reviewed options
Unsweetened oat milk
Use an equal amount of unsweetened oat milk for a widely available dairy-free swap.
Lactose-free milk
Use the same amount of lactose-free dairy milk.
Type the ingredient you're missing — we'll find what you can use instead.
Pitfalls to Watch Out For
- Instant oats become much softer and do not give the same sliceable texture as rolled oats.
- Cutting immediately after baking makes the oatmeal fall apart; let it rest before portioning.
- Baking until completely dry makes reheated portions tough; a soft moist interior is intentional.
Nutrition Context
- Oats and walnuts supply fiber and texture, while milk and eggs contribute protein to this warm breakfast.
- The rounded estimate assumes six portions, 2% milk, and the measured maple syrup; yogurt and other toppings are additional.
FAQ
Must I peel the apples?
No. Tender apple skin works well; dice the fruit into roughly half-inch pieces.
Can I assemble it the night before?
For the most consistent texture, keep wet and dry mixtures refrigerated separately and combine before baking.
Is it meant to be crisp?
The top is lightly golden but the center should be soft and moist, like a substantial spoonable oatmeal.
Can I reduce the maple syrup?
Yes. Reduce it by a tablespoon and use naturally sweet apples; it may taste less dessert-like.
How do I reheat a frozen portion?
Thaw overnight in the fridge, add a spoonful of milk, and heat gently until hot throughout.
What sides pair best with this dish?
Good pairings include Plain Greek yogurt; A boiled egg; Fresh pear slices. Choose one or two based on how substantial you want the meal to be.