Big Batch Slow Cooker Apple Cinnamon Oatmeal

As a busy home cook who values both nutrition and efficiency, I’ve learned that weekend meal prep is a game-changer. This big batch apple cinnamon oatmeal has become my go-to breakfast solution – it’s healthier than instant packets, naturally sweetened with fresh apples, and makes mornings a breeze. Whether you’re feeding a crowd or planning breakfasts for the week, this multi-cooker recipe delivers comfort in every bowl.

A bowl of slow cooker apple cinnamon oatmeal.

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Why This Recipe Works

Unlike instant oatmeal packets loaded with artificial ingredients and excess sugar, this recipe relies on fresh apples for natural sweetness and whole oats for lasting energy. The multi-cooker method ensures perfectly cooked oatmeal every time while making a large batch means breakfast is ready when you are.

Equipment Needed

Slow cooker or Multi-cooker (6-quart or larger)
Measuring cups and spoons
Sharp knife
Cutting board
Large spoon for stirring
Storage containers for leftovers

Ingredients and Their Roles

For the Oatmeal:

Old-fashioned rolled oats – Provides hearty texture and sustained energy
Apples, diced – Adds natural sweetness and fresh fruit flavor
Ground cinnamon – Brings warm, comforting spice
Salt – Enhances overall flavor
Water – Creates perfect cooking consistency
Milk (optional) – Adds creaminess and protein
Honey or maple syrup (optional) – Provides additional sweetness if desired

Step-by-Step Instructions

Preparation:

Core and dice apples into ¼-inch pieces
Measure out the remaining ingredients
Ensure the slow-cooker insert is clean and dry

Cooking Method:

Add oats, apples, cinnamon, and salt to multi-cooker
Pour in water and stir to combine
Close lid and set valve to sealing position
Select porridge setting (or manual/pressure cook)
Cook on high pressure for 10 minutes
Allow natural release for 10 minutes
Quick release remaining pressure
Stir in milk if using

Pro Tips for Perfect Oatmeal

Ingredient Selection

Use old-fashioned rolled oats (not quick or steel-cut)
Choose firm, sweet apples like Honeycrisp or Gala
Fresh ground cinnamon provides the best flavor
Filtered water prevents a metallic taste

Cooking Success

Don’t overfill multi-cooker
Stir well before cooking
Allow full natural release time
Adjust liquid for desired thickness

Common Questions & Troubleshooting

Why is my oatmeal too thick/thin?

Adjust the water ratio next time
Add hot water or milk to thin
Simmer to thicken if needed

Best Storage Methods:

Cool completely before storing
Portion into individual containers
Store with minimal airspace
Label with date

Dietary Modifications

Dairy-free: Use almond or oat milk
Sugar-free: Skip honey/maple syrup
Gluten-free: Use certified GF oats
Higher protein: Add Greek yogurt

Scaling the Recipe

Half batch: Reduce all ingredients by half
Double batch: Only if cooker size permits
Per person: Plan on ½-¾ cup cooked oatmeal

Apple cinnamon oatmeal in a bowl, cinnamon sticks, and walnuts.

Storage & Reheating

Storage Methods:

Refrigerator: 5-7 days in airtight containers
Freezer: Up to 3 months in freezer bags
Individual portions: 1-cup containers

Reheating Tips:

Microwave Method:
- Add a splash of milk or water
- Heat 1-2 minutes, stirring halfway
- Let stand 1 minute
Stovetop Method:
- Add liquid as needed
- Heat over medium-low
- Stir frequently

Serving Suggestions for Oatmeal for a Crowd

Toppings Bar Ideas

Fresh Fruits:
- Additional diced apples
- Berries like raspberries, blueberries, or strawberries
- Sliced bananas
Nuts & Seeds:
- Chopped walnuts
- Sliced almonds
- Pumpkin seeds
- Granola
- Chia seeds
Sweet Additions
- Brown sugar
- Maple syrup
- Honey
- Shredded sweetened coconut
- Raisins
- Cranberries or Craisins
Extra Warmth:
- Additional cinnamon
- Nutmeg
- Apple Pie Spice
Dairy and Dairy Substitutes
- Cream or half-and-half
- Butter
- Almond milk or other non-diary milk

Looking for more great ways of using oats? Try these oatmeal recipes.

More Apple Recipes

Be sure to look at my easy breakfasts and favorite crock pot recipes.

Big Batch Apple Cinnamon Oatmeal

How to make a large batch of oatmeal on the stovetop or in a multi-cooker. This is perfect for a big family or for when you want to make it ahead of time.

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Course: Breakfast

Cuisine: American

Keyword: Oatmeal Recipes

Prep Time: 5 minutes

Cook Time: 20 minutes

Total Time: 25 minutes

Servings: 12

Calories: 172kcal

Ingredients

6 cups water
2 cups whole milk do not use skim or 2% milk, it may curdle
4 cups old fashioned oats
1 teaspoon salt
3 teaspoons ground cinnamon
1/2 teaspoon nutmeg
1/2 cup brown sugar
1 1/2 cups chopped apple I prefer granny smith
1 teaspoon vanilla

Instructions

Multi Cooker Instructions

Place the multicooker on boil. Add water and milk, (use whole milk, lower fat milk may curdle). When the milk and water begins to simmer, add the oatmeal, salt, cinnamon, and nutmeg.
When the oatmeal begins to boil add the chopped apple. Cook on a full boil for 7 to 8 minutes. Stir frequently, the oatmeal will scorch if you do not stir.
Add brown sugar, and cook for 3 to 4 minutes more. Turn off the heat.
Add the vanilla and stir in well.

Stovetop Instructions

In a large pot, add water and milk, (use whole milk, lower fat milk may curdle). Cook on high. When the milk and water begin to simmer, add the oatmeal, salt, cinnamon, and nutmeg.
When the oatmeal begins to boil add the chopped apple. Cook on a full boil for 7 to 8 minutes. Stir frequently, the oatmeal will scorch if you do not stir.
Add brown sugar, and cook for 3 to 4 minutes more. Remove from heat.
Add the vanilla and stir in well.

Video

Nutrition