Apple Cinnamon Baked Oatmeal
Make apple cinnamon baked oatmeal with rolled oats, diced apples, maple syrup, and a tender center, plus meal-prep and freezing tips.
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Apple Cinnamon Baked Oatmeal
Make apple cinnamon baked oatmeal with rolled oats, diced apples, maple syrup, and a tender center, plus meal-prep and freezing tips.
15 minutes
40 minutes
75 minutes
6 servings
Breakfast
American
6 servings
300 calories
Equipment
8-inch square baking dish
Mixing bowls
Whisk
Thermometer
Ingredients
- 2 1/2 cups old-fashioned rolled oats
- 2 medium apples, diced small, about 2 cups
- 2 cups whole milk
- 2 large eggs
- 1/4 cup pure maple syrup
- 2 tablespoons unsalted butter, melted and cooled
- 1 teaspoon vanilla extract
- 1 1/2 teaspoons ground cinnamon
- 1 teaspoon baking powder
- 1/4 teaspoon fine salt
Instructions
- Heat oven to 350 degrees F. Grease an 8-inch square baking dish.
- Whisk milk, eggs, syrup, butter, and vanilla in a bowl. Mix oats, cinnamon, baking powder, and salt separately.
- Combine wet and dry mixtures and fold in the apples. Let stand 10 minutes.
- Spread in the dish and bake 35 to 45 minutes until golden and the egg-based center is set at 160 degrees F.
- Rest 10 minutes before cutting into 6 portions. Serve plain or with yogurt, not included in nutrition.
Notes
Nutrition is an estimate per serving, not a laboratory analysis. Brands, substitutions, and portion sizes affect the values. Image is an AI-generated illustration. This newly developed recipe has not been independently kitchen-tested. Use firm pears instead of apples or add a small handful of dried cranberries. Optional nuts change nutrition.
Storage
Refrigerate within 2 hours and use within 4 days. Freeze wrapped portions for up to 2 months for quality.
Reheating
Warm with a tablespoon of milk to 165 degrees F. Add yogurt or syrup after reheating.
Variations
Use firm pears instead of apples or add a small handful of dried cranberries. Optional nuts change nutrition.
Nutrition
Apple cinnamon baked oatmeal is a sliceable breakfast made with rolled oats, diced apples, milk, eggs, and a little maple syrup. It has a softer middle than an oatmeal bar and a lightly toasted surface, so it works warm with yogurt or as a square packed for another morning. The apples provide moisture and small bursts of sweetness without turning the whole dish into a sugary dessert.
This version bakes in an eight-inch square pan and makes six breakfast portions. The most useful detail is letting the oats sit in the liquid briefly before baking. That short rest hydrates the flakes and helps the center cook evenly. You can prepare the dry and wet components separately the night before, then combine them when the oven is ready.
Use Rolled Oats for a Tender Square
Old-fashioned rolled oats hold enough structure to make clean portions while softening in the milk. Instant oats absorb quickly and can produce a pasty center. Steel-cut oats need much more liquid and cooking time, so they are not a direct substitute. Check the package rather than assuming any container labeled oatmeal will behave the same way.
Measure the oats loosely instead of pressing them firmly into a cup. The recipe uses two and a half cups, with enough milk to hydrate them without leaving a pool under the finished bake. If you use certified gluten-free oats for dietary reasons, check the other packaged ingredients as well. Oats themselves are only one part of that decision.
Cut Apples Small Enough to Soften
Firm apples such as Honeycrisp, Gala, or Pink Lady give the bake recognizable pieces. Cut them into roughly quarter-inch dice. Large chunks can remain crunchy after the oats are set, especially when the peel is left on. Peeling is optional, but removing the skin makes the texture more uniform for younger eaters.
Two medium apples usually provide about two cups of dice. If your apples are very large, measure the cut fruit rather than using both automatically. Too much fruit adds extra water and makes it harder to judge the center. A tart apple creates more contrast with maple syrup, while a sweet apple lets you keep the added syrup modest.
Mix the Custard Before Adding Oats
Whisk milk, eggs, melted cooled butter, maple syrup, and vanilla in a large bowl until you no longer see separate egg streaks. Stir cinnamon, baking powder, and salt into the oats in another bowl. Combining each group first distributes the baking powder and spice more evenly than sprinkling them directly over a wet mound of oats.
Fold the apples into the final mixture and let it stand ten minutes. It will look looser than muffin batter, which is expected. Transfer it to a greased pan and level it gently without compacting the oats. A few flakes at the surface will toast more deeply; a completely dry top before baking usually means the milk measurement was too small.
Watch the Middle Rather Than the Clock Alone
Bake at 350 degrees F until the edges are golden and the center no longer looks liquid when the pan is nudged. A thin knife inserted near the middle should not bring up raw egg mixture. An instant-read thermometer should reach 160 degrees F in the egg-based center. A little softness from cooked apples is normal and different from uncooked custard.
Rest the pan ten minutes before cutting. The oats continue taking up moisture as they settle, so immediately lifting a hot square may make it fall apart. If you prefer a spoonable breakfast, serving sooner is fine once it is cooked through. For neat meal-prep pieces, let it cool further before transferring portions to containers.
Prepare Breakfast Without a Soggy Overnight Soak
You can mix the dry ingredients in one container and refrigerate the milk-and-egg mixture in another. Dice the apples close to assembly to keep their appearance fresh. Combining everything the night before is possible, but the oats absorb more liquid and the baked result is softer. That variation is useful if you like a pudding-like breakfast rather than a distinct square.
For a larger brunch, bake the oats alongside a savory option such as egg muffins. Plain Greek yogurt adds tang without more syrup. Warm milk poured over an individual square gives a traditional oatmeal feel, while a little nut butter makes the serving richer. Add these extras at the table so the original batch stays flexible.
Change the Fruit With Its Moisture in Mind
Firm pears can replace apples at the same diced volume. Frozen berries release more juice and may need a little extra baking time, so keep that swap modest rather than doubling the fruit. Raisins or dried cranberries add sweetness without as much liquid. A handful of chopped pecans is another option, but the base recipe is intentionally nut-free.
If using a plant-based milk, choose an unsweetened variety that you enjoy drinking. Coconut beverage has a more noticeable flavor than neutral oat or soy milk. Dairy milk provides protein that some alternatives do not, so nutrition will change with substitutions. The listed estimate covers a sixth of the oatmeal without yogurt, extra syrup, or nut butter.
Keep Portions Ready for Busy Mornings
Refrigerate the cooled bake within two hours and use within four days. Wrap portions separately if you plan to freeze them, then place them in a freezer container for up to two months for quality. Thaw overnight in the refrigerator. This works better than repeatedly warming and cooling the whole pan for small breakfasts.
Reheat a portion with a tablespoon of milk until it is hot throughout, reaching 165 degrees F for leftovers. Covering it loosely helps the edges stay tender in the microwave. For another apple breakfast with a different texture, try cinnamon muffins alongside fresh apple slices. Keep the baked oats simple and let the toppings supply variety during the week.
Variations
Use firm pears instead of apples or add a small handful of dried cranberries. Optional nuts change nutrition.
Storage and Reheating
Refrigerate within 2 hours and use within 4 days. Freeze wrapped portions for up to 2 months for quality.
Food Safety Source
For safe cooking temperatures and food handling basics, see the USDA safe minimum internal temperature chart.
Frequently Asked Questions
Can I use steel-cut oats?
No direct substitution is provided. Steel-cut oats need different liquid and much longer cooking than rolled oats.
Can I make this the night before?
Keep wet and dry mixtures separate for the clearest texture, or refrigerate the combined mixture for a softer result.
Should I peel the apples?
Peeling is optional. Small dice matters more for even softening, especially if you leave the skin on.
Does it freeze well?
Yes. Freeze cooled individual portions for up to 2 months for quality and thaw in the refrigerator.
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