This post may contain affiliate links. Please read our disclosure policy.
These Apple Cinnamon Baked Oatmeal Cups are one of those recipes I keep coming back to week after week. Made in one bowl with simple pantry ingredients, they bake up dense, hearty, and perfectly portioned. These are the kind of baked oatmeal cups you can grab on your way out the door without thinking twice about it.
I make a big batch every Sunday so we have breakfast covered for the whole week. They are denser than a muffin and more filling than a bowl of oatmeal, which is exactly what I wanted. The tart Granny Smith apple balances the warmth of the cinnamon and the sweetness of the brown sugar, and using vanilla almond milk adds just a little extra sweetness without going overboard. This is not a dessert-for-breakfast situation. It is a genuinely satisfying morning meal that holds its shape, travels well, and tastes great eaten straight from the fridge or warmed up for a minute in the microwave.
If you love easy, make-ahead breakfast options, my No Bake Peanut Butter Oatmeal Bars and Energy Bites are just as simple and perfect for keeping on hand all week.
Key Ingredients
- Rolled oats: Old-fashioned rolled oats are the right choice here. They give the cups structure and a satisfying chew. Quick oats will turn mushy and steel cut oats require a completely different liquid ratio.
- Granny Smith apple: The tartness is intentional. It balances the brown sugar and cinnamon perfectly. If you do not have Granny Smiths, Honeycrisp, Braeburn, or Pink Lady all work well for baking.
- Vanilla almond milk: This is my go-to for this recipe. The vanilla adds a little extra flavor and just enough sweetness. Any milk works here (dairy or non-dairy), but vanilla almond milk is worth the small swap if you have it.
- Applesauce: This is the moisture ingredient. It takes the place of butter or oil and keeps the cups soft inside without making them greasy.
- Brown sugar: Three-quarters of a cup goes into the batter, and 2 tablespoons get reserved for sprinkling on top. That topping is what gives you the caramelized crust. Do not skip it.
- Cinnamon and allspice: Cinnamon is the main flavor driver here. The allspice adds warmth and depth without being noticeable on its own.
How to Make Apple Cinnamon Baked Oatmeal Cups
1. Preheat your oven to 350 degrees Fahrenheit and spray a 24-cup muffin tin generously with nonstick cooking spray.
2. In a large bowl, combine the rolled oats, whisked eggs, diced apple, vanilla almond milk, 3/4 cup of the brown sugar, applesauce, baking powder, cinnamon, and allspice. Mix until everything is evenly combined. Note: Do not worry if the batter looks very loose, almost like a bowl of milky oatmeal. That is exactly what it should look like. The oats absorb the liquid as they bake and the cups will set up firm. Do not let the batter sit. Pour it into the pan right away, otherwise the oats will soak up the liquid before baking.
3. Pour the batter evenly into the muffin cups. Make sure each cup gets a good mix of both oats and liquid. Scoop from the bottom of the bowl so nothing settles.
4. Sprinkle about 1/4 teaspoon of the remaining brown sugar over the top of each muffin cup.
5. Bake for 30 minutes, or until a toothpick inserted in the center comes out clean and the tops are set.
6. Let the cups cool for 5 to 10 minutes in the pan before carefully removing them. They will firm up as they cool.
7. Serve warm or at room temperature. Store leftovers in the refrigerator for the week ahead.
Flavor Variations
The apple cinnamon base is the classic, but these baked oatmeal cups are easy to customize. Here are a few combinations worth trying:
Blueberry: Swap the diced apple for 1 cup of fresh or frozen blueberries. Add a pinch of lemon zest if you have it.
Banana walnut: Replace the apple with 1 cup of mashed ripe banana and fold in 1/3 cup of chopped walnuts. The banana adds natural sweetness so you can pull back the brown sugar slightly.
Peanut butter banana: Use mashed banana instead of the apple and stir 1/4 cup of peanut butter into the batter before portioning. Add mini chocolate chips on top before baking.
Mixed berry: Use a cup of mixed fresh or frozen berries in place of the apple. Raspberries, blackberries, and strawberries all work well.
Carrot cake: Swap the apple for 1 cup of finely shredded carrot, increase the cinnamon to 1 1/2 teaspoons, and add 1/4 teaspoon of nutmeg. Stir in 1/3 cup of raisins if you like.
Add-ins to try with any version: walnuts, pecans, raisins, craisins, mini chocolate chips, chia seeds, or a small handful of shredded coconut.
Serving Suggestions
These cups are as flexible as they are easy. Eat them cold straight from the fridge, warm them up for 30 to 60 seconds in the microwave, or dress them up a little for a slower morning at home. Here are a few of my favorite ways to serve them:
- Handheld, as-is: eat like a muffin, great for the car, school mornings, or tucking into a lunch bag
- Warmed with a drizzle of honey or maple syrup: pop one in the microwave for 30 seconds and drizzle with something sweet for a quick at-home breakfast
- With a smear of peanut butter or almond butter: adds protein and keeps you fuller longer
- Crumbled over yogurt: break one up over a bowl of vanilla Greek yogurt for a fast, filling breakfast with some extra protein
How to Store Apple Cinnamon Baked Oatmeal Cups
- Refrigerator: Store in an airtight container in the refrigerator for up to one week. They taste great cold or warmed up.
- Freezer: Let the cups cool completely, then wrap them individually or layer with parchment in a freezer-safe bag. They freeze well for up to 3 months. Thaw overnight in the refrigerator or microwave from frozen for 60 to 90 seconds.
- Reheating: Microwave for 30 to 60 seconds, or warm in a 350-degree oven for 5 to 6 minutes.
Frequently Asked Questions
No. Once the oats mix with the liquid, they start absorbing it quickly. If the batter sits, the cups can come out dry and dense instead of firm and moist. Mix the batter right before you are ready to bake. The good news: the finished cups keep in the fridge for a full week, so make a batch on Sunday and breakfast is handled.
Yes. Use certified gluten-free rolled oats and double-check your other ingredients. Everything else in this recipe is naturally gluten free.
Yes, and it makes removal much easier. If you use a silicone pan, you can skip the cooking spray. The cups will pop right out once they have cooled. A standard metal muffin tin works just as well as long as you spray it generously.
More Easy Make-Ahead Breakfast and Snack Recipes
Apple Cinnamon Baked Oatmeal Cups
Ingredients
- 3½ cups rolled oats
- 2 eggs whisked
- 1 large granny smith apple peeled, cored and diced about 1 ¼ cups
- 1¾ cups vanilla almond milk
- 2¾ cup brown sugar and 2 Tablespoons brown sugar divided
- ⅓ cup applesauce
- 1½ teaspoon baking powder
- 1 teaspoon cinnamon
- ¼ teaspoon allspice
Instructions
- Preheat the oven to 350 degrees Fahrenheit.
- Prepare a muffin pan by spraying it with cooking spray.
- Mix the rolled oats, eggs, granny smith apple, vanilla almond milk, ¾ cup of divided brown sugar, applesauce, baking powder, cinnamon, and allspice in a large bowl.
- Pour the oatmeal mixture into the muffin pan and sprinkle about ¼ teaspoon of the remaining brown sugar on top of each muffin. You should have about enough for all your muffins.
- Bake in the oven for 30 minutes or until an inserted toothpick comes out clean.
- Carefully remove the muffins from the pan and let cool.
- Plate your muffins and serve either warm or cold.
Jenn’s Notes
- Refrigerator: Store in an airtight container in the fridge for up to 1 week. They’re delicious either chilled or warmed before serving.
- Freezer: Let the cups cool completely, then wrap each one individually or separate layers with parchment in a freezer-safe bag. Freeze for up to 3 months. Thaw overnight in the refrigerator or heat straight from frozen in the microwave for 60–90 seconds.
- Reheating: Warm in the microwave for 30–60 seconds, or place in a 350°F oven for about 5–6 minutes until heated through.
- Spray the pan well. Since these cups don’t have butter or oil, they can stick easily if the pan isn’t properly greased. Make sure to coat each cup thoroughly, including the sides.
- Divide the batter evenly. Give the batter a quick stir before each pour, as the oats and liquid can separate over time. This helps ensure each cup bakes up with the right texture.
- Let them cool before removing. They may look just barely set when they come out of the oven, and that’s okay. As they cool, they’ll firm up and hold their shape much better when you take them out of the pan.
