This apple cinnamon baked oatmeal is what you make on Sunday so breakfast is handled for the next few days. Rolled oats, diced apples, and cinnamon get mixed in one bowl, poured into a baking dish, and baked until the top is golden and the middle is soft and custardy. It's an easy baked oatmeal recipe with no fancy ingredients, and it reheats well, so you can cut it into squares and grab one on a busy morning. If you like make-ahead breakfasts, it pairs nicely with our Zucchini Bread for a full week of grab-and-go options.
Why you'll love this recipe
- ✓One bowl, ten minutes of prep, then the oven does the work.
- ✓Stays soft for days in the fridge and reheats in about a minute.
- ✓Naturally sweetened with apples and a little maple syrup, no refined sugar needed.
Prep
10 min
Cook
40 min
Total
50 min
Yield
6 servings
Ingredients
- 3 cups old-fashioned rolled oats (270g)
- 1 tsp baking powder
- 1 1/2 tsp ground cinnamon
- 1/2 tsp salt
- 2 cups milk (480ml)
- 2 large eggs
- 1/3 cup maple syrup (80ml)
- 1/4 cup melted butter (60g)
- 2 tsp vanilla extract
- 2 medium apples, peeled and diced (about 2 cups)
- 1/2 cup chopped walnuts, optional (60g)
Instructions
- 1Preheat the oven to 350°F (175°C) and grease a 9x9-inch (23cm) baking dish.
- 2In a large bowl, stir together the oats, baking powder, cinnamon, and salt.
- 3In a separate bowl, whisk the milk, eggs, maple syrup, melted butter, and vanilla until smooth.
- 4Pour the wet mixture into the oats and stir until everything is coated. Fold in the diced apples and walnuts, if using.
- 5Pour the mixture into the baking dish and spread it out evenly.
- 6Bake for 35 to 40 minutes, until the top is golden and the center is set.
- 7Let it cool for 5 to 10 minutes, then cut into squares and serve warm with a splash of milk or a spoonful of yogurt.
Notes & Tips
- Use old-fashioned rolled oats. Quick oats turn mushy and instant oats fall apart.
- Firm apples like Honeycrisp or Granny Smith hold their shape best. Cut them small so they cook through.
- Fall apple season is the perfect time to pair this with our Classic Apple Pie if you're stocking up on apples.
Frequently Asked Questions
Can I make baked oatmeal the night before?
Yes. Mix everything, cover, and refrigerate overnight, then bake in the morning. Add 5 extra minutes to the bake time since it starts cold.
How long does baked oatmeal last in the fridge?
It keeps well for up to 5 days in an airtight container. Reheat a square in the microwave for 45 to 60 seconds.
Can I freeze baked oatmeal?
Yes. Cool it completely, cut into squares, and freeze in a sealed bag for up to 3 months. Reheat straight from frozen in the microwave.
Can I make baked oatmeal dairy-free?
Yes. Swap the milk for any plant-based milk and use coconut oil or a neutral oil in place of the butter.
Why is my baked oatmeal mushy in the middle?
It usually needs a few more minutes in the oven, or the apples were cut too large and released extra moisture. Bake until the center feels set when you press it lightly.

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