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Slow Cooker Apple Cinnamon Oatmeal Recipe

Slow Cooker Apple Cinnamon Oatmeal

iamwinfred
This Slow Cooker Apple Cinnamon Oatmeal is the ultimate set-it-and-forget-it breakfast. Steel-cut oats slow-cook overnight with tender diced apples, warm cinnamon, nutmeg, and a drizzle of pure maple syrup, filling your kitchen with the most incredible aroma by morning. It's creamy, naturally sweet, wholesome, and ready the moment you wake up — no standing over the stove required.
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Prep Time 10 minutes
Cook Time 8 hours
Total Time 8 hours 10 minutes
Course Breakfast
Cuisine American
Servings 6 bowls
Calories 270 kcal

Equipment

  • 6-quart slow cooker A 4-quart slow cooker also works for this recipe
  • Slow cooker liner Optional, but highly recommended for easy cleanup
  • Cutting board
  • Sharp knife For peeling and dicing apples
  • Measuring cups
  • Measuring spoons
  • Large spoon or silicone spatula For stirring
  • Apple peeler or vegetable peeler
  • Ladle For serving

Ingredients
  

  • 2 cups steel-cut oats about 320g; do not substitute rolled or instant oats
  • 3 medium apples peeled, cored, and diced into ½-inch pieces; Granny Smith, Honeycrisp, or Fuji recommended
  • 4 cups water about 960ml
  • 2 cups milk about 480ml; dairy or unsweetened almond, oat, or plant-based milk
  • 3 tablespoons pure maple syrup about 45ml; plus more for serving
  • 1½ teaspoons ground cinnamon
  • ¼ teaspoon ground nutmeg
  • ¼ teaspoon fine sea salt
  • 1 teaspoon pure vanilla extract
  • 1 tablespoon unsalted butter for greasing the slow cooker crock; or use non-stick cooking spray

For Serving (Optional)

  • maple syrup or brown sugar for additional sweetness at the table
  • fresh apple slices
  • chopped walnuts or pecans for crunch
  • ground cinnamon extra pinch for garnish
  • almond butter or peanut butter drizzle for added richness and protein
  • Greek yogurt serve alongside for added creaminess and protein
  • raisins or dried cranberries optional stir-in for chewy bursts of sweetness

Instructions
 

  • Coat the entire interior of the slow cooker crock — bottom and sides — with 1 tablespoon of unsalted butter or a generous spritz of non-stick cooking spray. Alternatively, insert a slow cooker liner for the easiest cleanup.
  • Peel, core, and dice the 3 apples into ½-inch cubes, keeping pieces uniform in size so they cook evenly. Set aside.
  • Pour the steel-cut oats into the greased slow cooker and spread into an even layer, then sprinkle the cinnamon, nutmeg, and salt directly over the oats and give a gentle stir to combine.
  • Pour in the water and milk, then add the maple syrup and vanilla extract. Stir everything together until well combined.
  • Scatter the diced apples evenly over the top of the oat mixture without stirring them in deeply — they will naturally sink and incorporate as the oatmeal cooks.
  • Place the lid on the slow cooker, set to LOW, and cook for 7 to 8 hours. Do not use the HIGH setting, as it can cause the oats to scorch and turn mushy.
  • Remove the lid and stir the oatmeal thoroughly from the bottom up. Taste and adjust sweetness with additional maple syrup if desired, and stir in a splash of warm milk or water if the oatmeal is thicker than you'd like.
  • Ladle into bowls and top with your choice of fresh apple slices, chopped nuts, a drizzle of maple syrup, a pinch of cinnamon, or a swirl of nut butter. Serve hot.

Notes

  • Steel-cut oats only: Rolled oats and instant oats will turn mushy after 7–8 hours. Steel-cut oats are the only variety that holds its texture through overnight slow cooking.
  • Grease generously: Don't skimp on greasing the crock. Oatmeal sticks and can scorch during long cooks — a well-buttered crock (or slow cooker liner) prevents this completely.
  • Always cook on LOW: HIGH heat causes liquid to evaporate too quickly and the oats to scorch. LOW for 7–8 hours delivers the best creamy, evenly-cooked result.
  • Best apple varieties: Use Granny Smith for tartness and structure, Honeycrisp or Fuji for natural sweetness. A combination of one tart and one sweet apple gives the best flavor depth.
  • Adjusting consistency: The oatmeal thickens naturally as it cooks and even more as it cools. Stir in warm milk or water one splash at a time until you reach your desired texture.
  • Make it vegan: Use plant-based milk (oat or almond milk work great) and replace the butter with coconut oil. The maple syrup is already vegan.
  • Storage: Cool completely and refrigerate in an airtight container for up to 5 days, or freeze in individual portions for up to 3 months.
  • Reheating: Add 2–3 tablespoons of milk or water per serving before microwaving or warming on the stovetop — oatmeal thickens significantly when chilled.
  • Flavor variations: Swap apples for pears and add ground ginger, or try a chai-spiced version with cardamom, cloves, and a pinch of black pepper alongside the cinnamon.
  • Boost the protein: Stir in 2 tablespoons of chia seeds or hemp seeds before cooking for extra fiber and plant-based protein without changing the flavor.

Nutrition

Serving: 1BowlCalories: 270kcalCarbohydrates: 50gProtein: 8gFat: 4gSaturated Fat: 1.5gPolyunsaturated Fat: 0.8gMonounsaturated Fat: 1.2gCholesterol: 7mgSodium: 110mgPotassium: 310mgFiber: 6gSugar: 16gVitamin A: 4IUVitamin C: 8mgCalcium: 13mgIron: 14mg
Keyword crockpot oatmeal, healthy breakfast meal prep, overnight oatmeal, slow cooker apple cinnamon oatmeal, steel cut oats slow cooker
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