Baked Oatmeal

I started making Baked Oatmeal when I got tired of rushed mornings and boring breakfasts. Each square has this tender, almost creamy texture with soft apples, toasted pecans, and tart cranberries baked right in. The cinnamon warmth and sweetness make every bite feel like a treat. You’ll actually look forward to reheating it all week.

A slice of baked oatmeal with nuts and raisins sits on a white plate, while a green apple is blurred in the background. This hearty baked oatmeal makes for a wholesome and delicious breakfast option.
Baked Oatmeal. Photo Credit: Splash of Taste.

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I bake it for meal prep Sundays when I need breakfast solved for the week, weekend brunches, and holiday mornings like Christmas and Easter. It’s budget-friendly and kid-friendly, great for feeding a crowd at home or taking to family gatherings. The oatmeal stays fresh in the fridge for 4 days or freezes for up to 3 months.

Ingredients You’ll Need

You’ll need all the ingredients shown in the photograph below.

Top-down view of labeled Baked Oatmeal ingredients: vanilla extract, butter, kosher salt, cinnamon, baking powder, pecans, oats, eggs, cranberries, raisins, milk, brown sugar, and apples.
Baked Oatmeal Ingredients. Photo Credit: Splash of Taste.

How to Make Baked Oatmeal with Step-By-Step Instructions

Scroll down for the full recipe card containing a full printable recipe and measurements in both US customary and metric units.

This baked oatmeal comes together quickly and bakes into a comforting breakfast casserole that feeds a crowd.

Prep the Baking Dish and Apples

Preheat your oven to 350°F and grab an 8×8-inch baking dish or a shallow Dutch oven pan. Coat with cooking spray so nothing sticks.

Spread the chopped Granny Smith apples in an even layer across the bottom so they’ll soften and caramelize while everything bakes. Using a mandoline slicer makes quick work of dicing the apples.

Mix the Dry Ingredients

In a large mixing bowl, combine the oats, half the pecans, brown sugar, baking powder, cinnamon, and salt. Stir everything together so the spices and sugar get evenly distributed throughout the oats.

Whisk the Wet Ingredients

In a separate bowl, whisk together the milk, eggs, and vanilla extract until smooth. I’m using whole milk here, but oat milk or unsweetened almond milk also works fine. A wire whisk helps break up the eggs and creates a silky mixture that’ll bind everything together.

Combine and Add Mix-Ins

Pour the milk mixture into the oat mixture and stir gently until well combined. Add the melted butter and stir again, then fold in the raisins and dried cranberries so they’re scattered throughout.

Assemble and Top

Pour the mixture over the apples in the prepared pan and spread it out evenly with a silicone spatula. Sprinkle the remaining pecans on top so they’ll toast and add crunch.

Bake Until Golden

Slide the pan into the oven and bake for 40 to 45 minutes, or until the top turns golden brown and the center is set. You’ll know it’s done when a toothpick inserted in the middle comes out mostly clean.

A white baking dish filled with a baked oatmeal and pecan mixture sits on a light surface next to a blue and white checkered cloth.
Bake 40–45 minutes until the top is golden and the center is set.

Cool and Serve

Let it cool for 5 minutes before scooping out servings. Serve warm on its own, with a splash of milk, or topped with a dollop of yogurt, and enjoy!

This baked oatmeal recipe travels beautifully to potlucks and brunches. Let it cool completely, then transfer portions to an airtight container and transport it in an insulated carrier so it stays warm or at an ideal temperature.

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A slice of baked oatmeal and nut crumble bar on a white plate, with scattered oats and a green apple nearby on a light surface.

Baked Oatmeal

Baked Oatmeal is my go-to when I need a week's worth of wholesome breakfasts ready without any morning stress. The oats bake into a tender, almost custardy texture studded with soft apples, toasted pecans, and tart cranberries, with cinnamon and brown sugar creating that cozy sweetness you crave on busy mornings. I make it for Christmas and Easter mornings, weekend brunches, and meal prep Sundays because it comes together quickly and reheats beautifully all week long. It stays fresh in the fridge for 4 days or freezes for up to 3 months, making it perfect for grab-and-go mornings.
Prep Time: 15 minutes
Cook Time: 45 minutes
Total Time: 1 hour
Course: Breakfast, Brunch, Casserole
Cuisine: American
Servings: 8
Calories: 517kcal

Equipment

Ingredients

  • Cooking spray
  • 2 cups Granny Smith apples peeled and chopped into ¼-inch pieces
  • 2 cups regular rolled oats
  • 1 cup toasted pecans chopped (divided)
  • ½ cup packed light brown sugar
  • 1 teaspoon baking powder
  • 1 teaspoon ground cinnamon
  • ½ teaspoon kosher salt
  • 2 cups whole milk
  • 2 large eggs
  • 1 teaspoon vanilla extract
  • 4 tablespoons salted butter melted
  • ¼ cup raisins
  • ¼ cup dried cranberries craisins

Instructions

  • Preheat your oven to 350°F (180°C). Lightly coat an 8×8-inch baking dish with cooking spray.
    Cooking spray
  • Evenly spread the chopped apples across the bottom of the prepared baking dish.
    2 cups Granny Smith apples
  • In a large bowl, combine the oats, ½ cup of chopped pecans, brown sugar, baking powder, cinnamon, and salt. Stir to mix.
    2 cups regular rolled oats, 1 cup toasted pecans, ½ cup packed light brown sugar, 1 teaspoon baking powder, 1 teaspoon ground cinnamon, ½ teaspoon kosher salt
  • In a separate bowl, whisk together the milk, eggs, and vanilla until smooth.
    2 cups whole milk, 2 large eggs, 1 teaspoon vanilla extract
  • Pour the milk mixture into the oat mixture and stir gently until well combined. Add the melted butter and stir again. Fold in the raisins and dried cranberries.
    ¼ cup raisins, ¼ cup dried cranberries, 4 tablespoons salted butter
  • Pour the mixture over the apples in the baking dish and spread it out evenly. Sprinkle the remaining ½ cup of pecans on top.
  • Bake for 40 to 45 minutes, or until the top is golden brown and the oatmeal is set in the center.
  • Let it cool for 5 minutes before serving. Enjoy warm—on its own or with a splash of milk or a dollop of yogurt!

Notes

I’ve learned a few tricks over the years that make baked oatmeal even better.
Use Granny Smith apples: Their tartness balances the sweetness of the brown sugar and keeps them from turning mushy during baking.
Toast the pecans first: If your pecans aren’t already toasted, spread them on a baking sheet and toast at 350°F for 5 to 7 minutes before chopping. It deepens their flavor, and you won’t regret it. I promise!
Don’t skip the melted butter: Adding it after combining the wet and dry ingredients keeps the oats tender instead of greasy. If you don’t have butter on hand, melted coconut oil works, too.
Customize the dried fruit: Swap raisins and cranberries for chopped dates, dried cherries, fresh or frozen blueberries, sliced pears, or peaches, depending on what you have.
Check the center before pulling it out: The edges will set faster than the middle, so use a toothpick or knife to test that the center isn’t still liquidy before taking it out of the oven.
Store properly: Cover it and refrigerate for up to 4 days, or flash-freeze unwrapped portions on a baking sheet and freeze for 1 hour so they don’t stick together, then freeze in airtight containers for up to 3 months. Thaw fully in the fridge, then microwave or reheat in the oven.

Nutrition

Calories: 517kcal | Carbohydrates: 70g | Protein: 14g | Fat: 22g | Saturated Fat: 7g | Polyunsaturated Fat: 5g | Monounsaturated Fat: 9g | Trans Fat: 0.2g | Cholesterol: 63mg | Sodium: 292mg | Potassium: 545mg | Fiber: 10g | Sugar: 21g | Vitamin A: 358IU | Vitamin C: 2mg | Calcium: 177mg | Iron: 4mg
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How to Store Leftovers

Store cooled baked oatmeal in an airtight container in the fridge for up to 4 days. Reheat individual portions in the microwave, or warm it whole in the oven, covered with foil. The texture stays nice and custard-like when reheated properly.

For longer storage, cut it into bars and wrap each piece in plastic wrap, then place them in a freezer-safe container for up to 3 months, and thaw overnight in the fridge before reheating, adding a splash of milk or water to rehydrate it if needed.

What to Serve With Baked Oatmeal

It pairs beautifully with fresh fruit like sliced bananas, strawberries, or blueberries. I also love serving it alongside scrambled eggs, egg bites, or a veggie frittata for a complete breakfast spread that covers protein and fiber.

For brunch, set out toppings like maple syrup, honey, yogurt, chopped walnuts, or almond butter so everyone can customize their servings. Hot coffee and fresh orange juice complete the meal, and the baked oatmeal is hearty enough to be the star or work as a side next to quiche or breakfast casseroles.

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