Apple Walnut Baked Oatmeal
Apple walnut baked oatmeal turns simple oats, crisp apples, and walnuts into a cozy breakfast that tastes like warm apple pie.
This easy baked oatmeal uses pantry basics and bakes into soft, lightly golden squares with tender fruit and nutty crunch. It is naturally wholesome, filling, and practical for busy mornings.
Why You’ll Love This Recipe
- Warm and cozy flavor: Cinnamon, vanilla, apples, and walnuts give each bite a soft apple pie feel.
- Great texture: The oats bake up tender in the center with lightly golden edges and crunchy walnuts.
- Simple prep: Stir everything in one bowl, pour it into a baking dish, and let the oven do the work.
- Meal prep friendly: It slices well, reheats easily, and keeps breakfast ready for several days.
Fabian’s Budget & Health Tip: Buy walnuts from the baking aisle in small bags, then stretch them by chopping them finely. You get crunch in every bite while using less. Rolled oats also add filling fiber, while apples bring natural sweetness without needing much else.
Ingredients (Serves 4)
- 2 cups rolled oats (180 g)
- 2 medium apples, cored and diced, about 2 cups (300 g)
- 1/2 cup chopped walnuts (60 g)
- 1 1/2 teaspoons ground cinnamon (4 g)
- 2 large eggs (about 100 g without shells)
- 2 cups low fat milk (480 ml)
- 2 teaspoons vanilla extract (10 ml)
- 1 teaspoon baking powder (4 g)
Optional: yogurt and honey for serving
Step-by-Step Instructions
1. Heat the Oven
Heat your oven to 375°F (190°C). Use an 8 inch square baking dish or a similar small baking dish. If your dish tends to stick, line it with parchment so the oatmeal lifts out cleanly.
2. Mix the Dry Ingredients
Add the rolled oats, cinnamon, and baking powder to a large mixing bowl. Stir until the cinnamon lightly coats the oats and the mixture smells warm and fragrant.
3. Stir in the Wet Ingredients
Crack in the eggs, then pour in the low fat milk and vanilla. Stir until the oats look evenly moistened and the mixture turns creamy. Fold in the diced apples and chopped walnuts, making sure the fruit and nuts spread through the bowl.
4. Fill the Baking Dish
Pour the oat mixture into the baking dish. Spread it into an even layer and press down gently with a spoon so the oats sit under the milk. You should see apple pieces and walnuts scattered across the top.
5. Bake Until Set
Bake for 35 to 40 minutes, until the center looks set and the top turns lightly golden. The edges should smell toasty, and a knife inserted near the center should come out mostly clean with a few soft oat crumbs.
6. Rest and Slice
Let the baked oatmeal rest for 10 minutes before slicing. This short rest helps the oats firm up, so each serving holds together instead of falling apart.
Expert Troubleshooting & FAQs
Why is my baked oatmeal too wet in the center?
It may need a few more minutes in the oven. The center should look set, not loose or shiny. Let it rest after baking because the oats keep absorbing moisture as they cool.
Can I use quick oats instead of rolled oats?
You can, but the texture will be softer and less chewy. Rolled oats give the best baked oatmeal texture because they hold their shape better.
Do I need to peel the apples?
No. Apple peel softens during baking and adds extra fiber. If you want a smoother texture, peel the apples before dicing them.
Can I make this apple walnut baked oatmeal ahead?
Yes. Bake it, cool it, and store it covered in the refrigerator for up to 4 days. Reheat slices in the microwave until warm, or cover and warm them in the oven.
What apples work best?
Use sweet, crisp apples that hold their shape, such as Honeycrisp, Gala, Fuji, or Pink Lady. Softer apples work too, but they melt more into the oats.
Estimated Nutritional Facts
These numbers are rough estimates per serving and may change based on the apples, milk, and walnuts you use.
- Calories: about 355
- Protein: about 14 g
- Carbs: about 45 g
- Fats: about 15 g
Apple Walnut Baked Oatmeal
Ingredients
- 2 cups rolled oats (180 g)
- 2 medium apples, cored and diced, about 2 cups (300 g)
- 1/2 cup chopped walnuts (60 g)
- 1 1/2 teaspoons ground cinnamon (4 g)
- 2 large eggs (about 100 g without shells)
- 2 cups low fat milk (480 ml)
- 2 teaspoons vanilla extract (10 ml)
- 1 teaspoon baking powder (4 g)
Instructions
- 1. Heat the Oven. Heat your oven to 375°F (190°C). Use an 8 inch square baking dish or a similar small baking dish. If your dish tends to stick, line it with parchment so the oatmeal lifts out cleanly.
- 2. Mix the Dry Ingredients. Add the rolled oats, cinnamon, and baking powder to a large mixing bowl. Stir until the cinnamon lightly coats the oats and the mixture smells warm and fragrant.
- 3. Stir in the Wet Ingredients. Crack in the eggs, then pour in the low fat milk and vanilla. Stir until the oats look evenly moistened and the mixture turns creamy. Fold in the diced apples and chopped walnuts, making sure the fruit and nuts spread through the bowl.
- 4. Fill the Baking Dish. Pour the oat mixture into the baking dish. Spread it into an even layer and press down gently with a spoon so the oats sit under the milk. You should see apple pieces and walnuts scattered across the top.
- 5. Bake Until Set. Bake for 35 to 40 minutes, until the center looks set and the top turns lightly golden. The edges should smell toasty, and a knife inserted near the center should come out mostly clean with a few soft oat crumbs.
- 6. Rest and Slice. Let the baked oatmeal rest for 10 minutes before slicing. This short rest helps the oats firm up, so each serving holds together instead of falling apart.
