Apple Cinnamon Baked Oatmeal Recipe

This easy apple cinnamon baked oatmeal features a crunchy pecan topping you’ll adore. Ready in under an hour, it’s a nutritious, comforting breakfast that works well for guests or for meal prepping the week ahead.

Think of this dish as a delicious cross between classic baked oats and an apple crisp: tender baked oats studded with apple pieces, finished with a buttery pecan crumble for contrast. The recipe yields eight hearty servings — ideal for a family breakfast, holiday brunch, or to slice and freeze for quick mornings.

It freezes and reheats beautifully, making it a smart, make-ahead breakfast choice. The warm flavors of apple and cinnamon shine year-round, and the protein and fiber from oats and pecans keep the meal satisfying.

Ingredients

Below is a concise ingredient overview. Exact quantities and the printable recipe card appear in the recipe section further down.

• Milk — Use almond milk, dairy milk, soy milk, or another preferred milk to keep the oatmeal moist and creamy.
• Apple butter and maple syrup — These sweeteners build deep apple flavor and gentle sweetness. Use store-bought apple butter or homemade if available.
• Rolled oats — Use old-fashioned rolled oats for the correct texture; avoid instant or steel-cut oats here.
• Apples — Cored and diced into ¼-inch cubes. Honeycrisp, Gala, or Fuji work especially well.
• Spices — Apple pie spice and ground cinnamon bring warm, autumnal flavor. A pinch of salt balances the sweetness.
• Pecans and unsalted butter — Coarsely chopped pecans mixed with melted butter form the crisp crumble topping; if only salted butter is on hand, omit added salt.

How to make the best baked oatmeal

Prepare a mixing bowl, a whisk, a spatula, and a greased 9×13 baking dish. The process is straightforward: make the oat base, mix the topping, assemble, and bake. Read through the steps below before beginning to ensure a smooth workflow.

Make the oatmeal base

Preheat the oven to 350°F (about 175°C) and grease a 9×13-inch baking dish. In a mixing bowl, whisk together the milk, ½ cup apple butter, and ½ cup maple syrup until smooth. Fold in 2 cups rolled oats, 1½ apples diced into ¼-inch pieces, 2 teaspoons apple pie spice, 1 teaspoon ground cinnamon, and ½ teaspoon salt. Mix until evenly combined, then transfer the oat mixture to the prepared baking dish, pressing gently to spread it evenly.

Make the topping

In the same bowl or a separate bowl, combine 1 cup chopped pecans with the remaining ½ apple (diced), ¼ cup apple butter, 2 tablespoons melted unsalted butter, 2 tablespoons maple syrup, and ½ teaspoon cinnamon. Toss until evenly coated, then sprinkle or spread the crumble evenly over the oat mixture in the baking dish.

Bake

Bake in the preheated oven for 25 to 30 minutes, or until the center is set and the topping is golden. Remove from the oven and allow the baked oatmeal to cool for about 10 minutes before slicing — this resting time helps it firm up and makes serving neater.

Storing & reheating

Allow the baked oatmeal to cool completely, then store in an airtight container in the refrigerator for 4–5 days. For longer storage, wrap individual slices tightly in plastic wrap or parchment and place them in a freezer-safe bag; freeze for up to 3 months.

To reheat a full pan, cover with foil and warm in a 350°F oven for 15–20 minutes. Reheat individual slices in a toaster oven at 350°F for 5–10 minutes, or in the microwave in 1-minute intervals at medium power until heated through.

Tips & suggestions

• If you have homemade apple butter, use it — it deepens the apple flavor, though store-bought works fine too.
• Swap pumpkin pie spice for apple pie spice if you prefer a slightly different warm spice profile; either choice complements the apples.
• Experiment with mix-ins: try walnuts instead of pecans, or add raisins or dried cranberries to the oat base for extra texture and sweetness.
• Let the baked oatmeal rest for at least 10 minutes after baking to achieve the best texture and easier slicing.

More make-ahead breakfasts

• Breakfast casseroles and frittatas that reheat well
• Sheet-pan egg bakes for quick portioned servings
• Overnight oats or chia puddings for grab-and-go mornings
• Baked oatmeal variations with different fruit and nut combinations

If you enjoy baked oats, try swapping apples for berries or bananas and adjusting the topping to match — the method adapts easily to seasonal fruit and personal taste.