Apple Cinnamon Baked Oatmeal

Apple Cinnamon Baked Oatmeal is a cozy fall breakfast with tender apples, warm cinnamon, and fiber-rich oats and flaxseed in every bite. Bake it once, slice it into squares, and pair it with Greek yogurt, eggs, or a protein coffee for a balanced breakfast that’s ready when you are.

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Reasons You’ll Love This Recipe:

• Perfect for meal prep – Bake one pan, slice it into squares, and breakfast is ready to grab on busy mornings.
• Fiber-rich ingredients – Oats, flaxseed, and apples add fiber to help keep you satisfied until lunch.
• Easy to pair with protein – Enjoy a square with Greek yogurt, eggs, a protein shake, or protein coffee for a breakfast with 30+ grams of protein.
• Lightly sweetened – A touch of honey and sweet baked apples keep the flavor cozy without being overly sugary.
• Family-friendly – Kids and adults both love it, and it’s easy to warm up or eat straight from the fridge.
• Freezer friendly – Freeze individual squares so you always have a ready-made breakfast on hand for the weeks ahead.

Ingredients & Substitutions:

For a full ingredient list with quantities, please check out the recipe card at the bottom of this post.

• Greek yogurt – Adds creaminess, moisture, and a little extra protein. Plain or vanilla both work, and a dairy-free yogurt can be swapped in.
• Milk – Any milk you have on hand works here, including unsweetened plant-based milk.
• Eggs – Help bind everything together so the oatmeal slices into clean squares.
• Honey – Adds just enough sweetness. Maple syrup works as a one-to-one swap.
• Vanilla bean paste or extract – Either works, but vanilla bean paste gives those pretty little vanilla flecks.
• Old-fashioned rolled oats – Give the best hearty texture. Quick oats will make it softer, and steel-cut oats won’t work here. Use certified gluten-free oats if needed.
• Ground flaxseed – Adds fiber and healthy fats. Chia seeds can be used instead.
• Cinnamon – Brings the cozy fall flavor. Swap in apple pie spice or pumpkin pie spice for a twist.
• Baking powder – Gives the oatmeal a little lift so it’s tender, not dense.
• Kosher salt – Balances the sweetness. If using table salt, use a little less.
• Apples – Any variety works, but firm, sweet-tart apples like Honeycrisp or Pink Lady hold their shape best. Peeling is optional. Diced pears are a great swap too.

How to Make Apple Cinnamon Baked Oatmeal

For complete instructions, please check out the recipe card at the bottom of this post.

1. Prep the pan – Preheat the oven and grease an 8×8-inch baking dish.
2. Mix the wet ingredients – Whisk the Greek yogurt, milk, eggs, honey, and vanilla together in a large bowl until smooth.
3. Add the dry ingredients – Stir in the oats, ground flaxseed, cinnamon, baking powder, and salt until everything is combined.
4. Fold in the apples – Gently stir in the diced apples so they’re evenly spread throughout the batter.
5. Bake – Pour the batter into the prepared pan and bake until the edges are golden brown and the center is gently set.
6. Cool and slice – Let it cool for a few minutes, then slice into squares and enjoy.

Tips and Variations

• Check for doneness – Look for golden brown edges and a center that’s set but not firm. It shouldn’t jiggle when you gently shake the pan.
• Pair with protein – Round out your breakfast by topping a square with Greek yogurt or serving it alongside scrambled eggs, a protein shake, or a protein coffee.
• Add some crunch – Stir in or sprinkle on chopped pecans, walnuts, or pumpkin seeds for extra texture and healthy fats.
• Top it off – A drizzle of peanut butter or almond butter, a spoonful of Greek yogurt, or a little extra cinnamon makes each square feel extra cozy.
• Mix up the fruit – Swap half the apples for diced pears, or toss in a handful of dried cranberries for a festive fall twist.
• Dice the apples small – Smaller pieces soften evenly and make the squares easier to slice cleanly.

Meal Prep & Storage

• Fridge – Store sliced squares in an airtight container in the fridge for up to 3 days.
• Freezer – Freeze individual squares in a freezer-safe container or bag for up to 1 month.
• Thawing – Thaw frozen squares overnight in the fridge before reheating.
• Microwave – Reheat for about 1 minute, though exact times will vary based on your microwave.
• Air fryer – For crispy edges, reheat at 350°F for 4-5 minutes, adjusting based on the size and strength of your air fryer.
• Enjoy cold – It’s also delicious straight from the fridge for a true grab-and-go breakfast.

Recipe FAQs

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