Starting your day with a delicious and wholesome breakfast doesn’t have to be a scramble, even on the busiest mornings.

These apple cinnamon baked oatmeal squares are the perfect solution for anyone looking for a convenient, make-ahead option that tastes incredible. They’re packed with comforting flavors and hearty oats, ensuring you stay satisfied until lunchtime.
Imagine waking up to a warm, spiced breakfast that’s ready to eat with minimal effort. This recipe delivers exactly that – a simple, family-friendly dish that brings the cozy aroma of apples and cinnamon right into your kitchen. It’s a fantastic way to enjoy a nutritious meal without compromising on taste or precious morning time.
Table of Contents
- What You’ll Love About This Quick And Easy Recipe
- Everything You Need To Make This Recipe Without Stress
- Time Needed From Start To Finish
- How To Make It Step By Step With Visual Cues
- Easy Variations And Serving Ideas That Fit Real Life
- Common Slip-Ups And How To Avoid Them
- How To Store It And Make It Ahead Without Ruining Texture
- Questions People Always Ask Before Making This Recipe

Apple Cinnamon Baked Oatmeal Squares
- Total Time: 40-50 minutes
- Yield: 9 servings 1x
Description
These apple cinnamon baked oatmeal squares are a convenient and delicious make-ahead breakfast option. Packed with comforting flavors and hearty oats, they are easy to prepare, family-friendly, and perfect for busy mornings. This recipe is versatile, allowing for simple substitutions and creative serving ideas, and stores well for grab-and-go meals throughout the week.
Ingredients
Instructions
1. Preheat your oven to 375 F (190 C). Lightly grease an 8×8 inch or 9×9 inch baking dish with melted butter or coconut oil.
2. In a large mixing bowl, whisk together the old-fashioned rolled oats, ground cinnamon, baking powder, salt, and brown sugar. Make sure there are no clumps of brown sugar and all ingredients are evenly distributed.
3. In a separate medium bowl, whisk together the milk, egg, unsweetened applesauce, and vanilla extract until well combined and smooth.
4. Pour the wet ingredient mixture into the bowl with the dry ingredients. Stir gently with a spoon or spatula until just combined. Be careful not to overmix; a few lumps are fine.
5. Gently fold in the finely diced apple pieces. Ensure they are evenly distributed throughout the oatmeal mixture.
6. Pour the oatmeal mixture into your prepared baking dish, spreading it out evenly with your spatula.
7. Bake for 30-35 minutes, or until the top is lightly golden brown and the oatmeal is set in the center. A good visual cue is when the edges start to pull away slightly from the sides of the dish.
8. Remove the baking dish from the oven and let it cool for at least 10-15 minutes before slicing into squares and serving. This cooling time allows the oatmeal to firm up, making it easier to cut.
- Prep Time: 10-15 minutes
- Cook Time: 30-35 minutes
- Category: breakfast
- Method: baking
- Cuisine: american
Nutrition
- Serving Size: 1 square
Keywords: oatmeal, baked oatmeal, apple, cinnamon, breakfast, make-ahead, healthy, easy, comfort food, family-friendly
What You’ll Love About This Quick And Easy Recipe
This recipe for apple cinnamon baked oatmeal squares is a true winner for many reasons, making it ideal for busy individuals and families alike. First and foremost, it’s incredibly easy to prepare, requiring minimal kitchen skills and straightforward steps. You don’t need any fancy equipment or exotic ingredients, making it accessible to every home cook. It’s perfect for those who want a healthy breakfast without a lot of fuss. This dish shines as a make-ahead option; you can bake a batch on Sunday and enjoy grab-and-go breakfasts throughout the week. It caters wonderfully to kids and adults, offering a naturally sweet and comforting flavor profile that appeals to almost everyone. Serve it as a quick weekday breakfast, a hearty brunch item, or even a wholesome snack. Its portability also makes it great for packing in lunchboxes or taking to work.
Everything You Need To Make This Recipe Without Stress
Gathering your ingredients for these baked oatmeal squares is a breeze, as most items are likely already in your pantry. We’re focusing on simple, wholesome components that come together to create a flavorful and satisfying breakfast. This recipe is designed to be approachable, so don’t worry about needing specialty items.
INGREDIENTS:

- 2 cups old-fashioned rolled oats (not instant or quick-cooking)
- 1 teaspoon ground cinnamon
- 1/2 teaspoon baking powder
- 1/4 teaspoon salt
- 1/4 cup brown sugar, packed
- 2 cups milk (dairy or non-dairy)
- 1 large egg
- 1/4 cup unsweetened applesauce
- 1 teaspoon vanilla extract
- 1 medium apple, peeled, cored, and finely diced
- 2 tablespoons melted butter or coconut oil (for greasing pan and optional drizzle)
For simple substitutions, feel free to use any type of milk you prefer, whether it’s whole milk, skim milk, almond milk, or oat milk – they all work well. If you don’t have applesauce, you can use an additional 1/4 cup of milk, though the applesauce adds a lovely natural sweetness and moisture. For the apple, any firm, sweet-tart apple like Honeycrisp, Fuji, or Gala will be delicious. If you’re out of brown sugar, granulated sugar can be used, but brown sugar adds a richer, molasses-like flavor.
Time Needed From Start To Finish
One of the best aspects of these apple cinnamon baked oatmeal squares is how efficiently they come together, making them ideal for fitting into a busy schedule.
- Preparation time: 10-15 minutes
- Baking time: 30-35 minutes
- Total estimated time: 40-50 minutes
This timing allows for quick assembly and a reasonable baking period, ensuring you can have a fresh batch ready relatively quickly, or prepare it the night before for an even faster morning.
How To Make It Step By Step With Visual Cues

Making these baked oatmeal squares is a straightforward process. Following these steps will ensure you get perfectly tender and flavorful results every time.
- Prepare your baking dish: Preheat your oven to 375°F (190°C). Lightly grease an 8×8 inch or 9×9 inch baking dish with melted butter or coconut oil. This prevents the oatmeal from sticking and makes for easy serving.
- Combine dry ingredients: In a large mixing bowl, whisk together the old-fashioned rolled oats, ground cinnamon, baking powder, salt, and brown sugar. Make sure there are no clumps of brown sugar and all ingredients are evenly distributed.
- Mix wet ingredients: In a separate medium bowl, whisk together the milk, egg, unsweetened applesauce, and vanilla extract until well combined and smooth.
- Combine wet and dry: Pour the wet ingredient mixture into the bowl with the dry ingredients. Stir gently with a spoon or spatula until just combined. Be careful not to overmix; a few lumps are fine.
- Fold in apples: Gently fold in the finely diced apple pieces. Ensure they are evenly distributed throughout the oatmeal mixture.
- Transfer to baking dish: Pour the oatmeal mixture into your prepared baking dish, spreading it out evenly with your spatula.
- Bake until golden: Bake for 30-35 minutes, or until the top is lightly golden brown and the oatmeal is set in the center. A good visual cue is when the edges start to pull away slightly from the sides of the dish.
- Cool and serve: Remove the baking dish from the oven and let it cool for at least 10-15 minutes before slicing into squares and serving. This cooling time allows the oatmeal to firm up, making it easier to cut.
Easy Variations And Serving Ideas That Fit Real Life
These apple cinnamon baked oatmeal squares are wonderfully versatile, allowing for easy adaptations and creative serving options to suit any preference or occasion.
For a kid-friendly twist, consider adding a handful of mini chocolate chips along with the apples, or a sprinkle of chopped walnuts or pecans for a bit of crunch and extra nutrients. A drizzle of maple syrup or honey over individual squares just before serving is always a hit. You can also swap out the apple for other fruits like diced pears, berries (fresh or frozen), or even mashed banana for a different flavor profile. If using frozen berries, there’s no need to thaw them first; just stir them in.
When serving, these squares are fantastic on their own, but they also pair beautifully with a dollop of Greek yogurt for added protein, a splash of extra milk, or a spoonful of nut butter. For a more indulgent treat, a scoop of vanilla ice cream or a swirl of whipped cream makes them dessert-worthy. They’re perfect for a casual family breakfast, but can also be part of a larger brunch buffet. Simply arrange the squares on a platter alongside other breakfast favorites.
Common Slip-Ups And How To Avoid Them
Even with a simple recipe like baked oatmeal, a few common mistakes can impact the final outcome. Knowing how to sidestep these pitfalls will ensure your squares turn out perfectly every time.
One frequent issue is using the wrong type of oats. Instant or quick-cooking oats absorb liquid too quickly and can result in a mushy, gluey texture. Always opt for old-fashioned rolled oats for the best chew and structure. Another common mistake is overmixing the batter. While it’s not as critical as with cakes or muffins, overmixing can sometimes lead to a tougher texture. Stir just until the ingredients are combined.
Not greasing the baking dish properly can lead to the oatmeal sticking, making it difficult to remove the squares cleanly. A thorough coating of butter or coconut oil is essential. Finally, not allowing the oatmeal to cool sufficiently before cutting can result in crumbly, messy squares. The cooling time allows the oats to fully set and firm up, making for neat, clean cuts. Patience here pays off!
How To Store It And Make It Ahead Without Ruining Texture
These apple cinnamon baked oatmeal squares are truly designed for make-ahead convenience, and they store beautifully without losing their delicious texture.
To store, first ensure the baked oatmeal has cooled completely to room temperature. Once cool, you can cut it into individual squares. Place the squares in an airtight container, separating layers with parchment paper if stacking them. Store them in the refrigerator for up to 4-5 days.
For longer storage, you can freeze the squares. Wrap individual squares tightly in plastic wrap, then place them in a freezer-safe bag or container. They will keep well in the freezer for up to 2-3 months.
When you’re ready to enjoy them, simply reheat. From the refrigerator, you can warm them in the microwave for 30-60 seconds, or in a toaster oven at 350°F (175°C) for about 5-10 minutes until heated through. If reheating from frozen, you can microwave them for 1-2 minutes, or bake in a preheated oven (or toaster oven) at 350°F (175°C) for 15-20 minutes, or until warm in the center. This make-ahead capability makes them an absolute lifesaver for busy mornings.
Questions People Always Ask Before Making This Recipe
Here are some common questions that often come up when people are considering making these apple cinnamon baked oatmeal squares, along with clear answers to help you feel confident in the kitchen.
Can I use steel-cut oats instead of rolled oats? No, steel-cut oats require a much longer cooking time and more liquid, so they are not a direct substitute for rolled oats in this recipe.

FAQs
- Can I make these ahead? Yes—prep ahead, refrigerate, then serve when ready.
- How long do leftovers last? Store covered in the fridge for 3–4 days for best texture.
- Can I adjust sweetness? Yes—add more or less sweetener to taste.
- Can I change the fruit? Yes—swap strawberries for blueberries, raspberries, or sliced banana.












