Cinnamon Apple Baked Oatmeal

Imagine waking up to the scent of warm cinnamon, apples, and oats baking in the oven, a little hint of autumn drifting through your kitchen. This apple baked oatmeal is one of those recipes that feels like pure comfort in a bowl, wholesome enough for a busy weekday yet cozy enough for a slow weekend brunch. It is family-approved, endlessly adaptable, and honestly good enough to eat any time of day.

If you are looking for a cozy, flavor-packed, and nourishing way to start your morning, this baked oatmeal is calling your name. It bakes up soft and tender with pockets of sweet apple in every bite, and it reheats like a dream, making it the ultimate make-ahead breakfast. Let’s dig in.

Why You’ll Love This Recipe

This baked oatmeal is wonderfully easy and quick. With simple ingredients and minimal prep, it is the kind of breakfast you can pull together even on a hectic morning, then let the oven do the rest of the work. It is also a meal-prep superstar, since a single batch made at the start of the week gives you ready-to-go breakfasts for days.

Beyond the convenience, it is deeply comforting and completely customizable. The combination of baked apples, warm cinnamon, and a touch of maple sweetness makes it taste like an indulgent treat while still being genuinely nourishing. Love nuts or dried fruit? Stir them in. Need it dairy-free or gluten-free? Simple swaps make it work for almost any diet.

Ingredients

The base of this bake starts with 2 cups of rolled oats, which give the oatmeal its hearty, satisfying texture. You will bind and moisten them with 2 cups of milk, either regular dairy or any non-dairy alternative like almond, oat, or soy, plus 1 large egg to hold everything together as it bakes.

For flavor and warmth, fold in 2 cups of chopped apples, about two medium apples, along with 1 1/2 teaspoons of cinnamon, the cozy heart of the whole recipe. Sweetness comes from 1/4 cup of maple syrup, which pairs beautifully with the apples, and 1 teaspoon of vanilla extract deepens all those warm notes.

Rounding things out are 1 teaspoon of baking powder, which lends a slightly fluffy lift, and 1/4 teaspoon of salt to balance the sweetness. A mix of sweet and tart apples, with Granny Smith being a reliable favorite, gives the best flavor contrast.

Step-by-Step Instructions

Start by preheating your oven to 350 degrees Fahrenheit (175 degrees Celsius) and greasing a 9×9-inch baking dish with a neutral oil or a bit of butter. This size gives you a nicely thick, sliceable bake.

In a large bowl, combine the dry ingredients: the rolled oats, cinnamon, baking powder, and salt. Give everything a good stir so the spices and leavening are evenly distributed throughout the oats, which ensures consistent flavor in every serving.

In a separate bowl, whisk together the wet ingredients: the egg, milk, maple syrup, and vanilla extract. Pour this mixture over the dry ingredients and stir until well combined. Then gently fold in the chopped apples so those little pops of sweetness are scattered throughout the bake. Take care not to overmix, as stirring too vigorously can make the finished oatmeal dense.

Pour the mixture into your prepared baking dish and smooth the top with a spatula. Bake for 35 to 40 minutes, until the top is golden and the oats are set. Let it cool for a few minutes before slicing, then serve warm with an extra drizzle of maple syrup or a splash of milk if you like it a bit creamier.

Tips for the Best Apple Baked Oatmeal

This oatmeal is built for making ahead. It reheats beautifully, so warm individual servings in the microwave for about 30 seconds with a little splash of milk to bring back that just-baked softness. It is also freezer-friendly, so let portions cool completely, wrap them in plastic wrap, and store them in a freezer bag for grab-and-go mornings. The golden rule is not to overmix the batter, since gentle stirring keeps the texture light rather than heavy.

Feel free to make it your own by adding pecans, walnuts, or dried cranberries for extra crunch and flavor. For a vegan version, swap the egg for a flax egg made from 1 tablespoon of ground flaxseed and 3 tablespoons of water. If you love a cozy baked breakfast, you will also enjoy these baked gingerbread oatmeal cups or this crowd-pleasing cranberry orange French toast bake for weekend mornings.

Frequently Asked Questions

Can I make this gluten-free?
Absolutely. Just use certified gluten-free rolled oats. Every other ingredient in the recipe is naturally gluten-free, so the swap is seamless.

How do I store leftovers?
Store the baked oatmeal in an airtight container in the refrigerator for up to 4 days. Reheat individual portions in the microwave, or warm the whole dish in the oven at 300 degrees Fahrenheit for about 10 minutes.

Can I make this sugar-free?
You can. Replace the maple syrup with a sugar-free sweetener like stevia or monk fruit, adjusting the amount to suit your taste.

Can I make it vegan?
Yes. Use a non-dairy milk and replace the egg with a flax egg (1 tablespoon ground flaxseed mixed with 3 tablespoons water, rested for 5 minutes). The result is just as tender and cozy.

Which apples work best?
A mix of sweet and tart apples gives the best flavor. Granny Smith is a great tart choice, while Honeycrisp or Fuji add natural sweetness. Use whatever you have on hand or combine a couple of varieties.

There is nothing like a warm, hearty baked oatmeal to start your day right, and this cinnamon apple combination is a total winner. For more wholesome inspiration, browse these healthy eating ideas, and when you make it, tag @thekitchensaid on Instagram so we can see what you whip up.