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Easy Overnight Baked Oatmeal Recipe
Ash Tyrrell

Easy Overnight Baked Oatmeal Recipe

I make this overnight baked oatmeal on Sunday nights so my mornings basically run themselves. I mix everything in one bowl, slide the dish into the fridge, and forget about it until I'm ready to bake it the next day. There's no scrambling for cereal, no dirty pots at 7 a.m., and no "what's for breakfast" panic with my kids.
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Total Time 8 hours 45 minutes
Servings: 8
Ingredients Method Notes

Ingredients
  

  • 2 cups old-fashioned rolled oats – stick with rolled oats not instant or quick oats, since they hold their texture instead of turning mushy
  • 2 cups milk dairy or plant-based – gives the oatmeal its soft, custardy texture as it bakes
  • 2 large eggs – helps the oatmeal set into slices instead of falling apart
  • 1/3 cup brown sugar or maple syrup – sweetens the dish naturally adjust to taste
  • 2 teaspoons baking powder – gives the bake a slightly lighter less dense texture
  • 1 teaspoon ground cinnamon – adds warmth without overpowering the fruit
  • 1 teaspoon vanilla extract – rounds out the flavor and makes it smell amazing while baking
  • 1/2 teaspoon salt – balances the sweetness so the dish doesn't taste flat
  • 3 tablespoons melted butter or oil – keeps the oatmeal from drying out in the oven
  • 1 cup fresh or frozen blueberries – adds natural sweetness and a pop of color fresh works best if you have it
  • 1/2 cup dried cherries or raisins – gives little chewy bites throughout don't skip these if you like texture

Method
 

  1. Start by coating your 8x8-inch dish with non-stick spray or a light layer of butter. This step matters more than people think, since baked oatmeal can stick stubbornly to the pan. A well-greased dish makes serving and cleanup so much easier the next morning.
  2. In a large bowl, whisk together the milk, eggs, melted butter, brown sugar, vanilla, cinnamon, baking powder, and salt. Whisk until everything looks smooth and fully combined. This base is what gives the oatmeal its creamy, custard-like texture once it bakes.
  3. Add the rolled oats, blueberries, and dried cherries into the bowl and stir gently until everything is evenly coated. Try not to overmix at this point, since you just want the oats and fruit distributed, not broken down.
  4. Pour the mixture into your prepared baking dish and spread it out evenly. Cover tightly with plastic wrap or a fitted lid, then place it in the fridge for at least 8 hours or overnight. This resting time lets the oats soften and soak up the liquid.
  5. The next morning, preheat your oven to 350°F. Remove the dish from the fridge, uncover it, and give it a gentle stir. Bake for 35-40 minutes, or until the top turns golden and the center feels set rather than jiggly.
  6. Let the oatmeal rest for about 5 minutes after pulling it from the oven. This short cooling window helps it firm up so you can cut clean slices instead of a mushy scoop. Serve warm, straight from the dish.

Notes

  • I always use old-fashioned oats, never instant, because instant oats turn the whole thing gummy
  • I let the dish sit out for 10 minutes before baking if I forgot it overnight and only had 4-5 hours to chill, since it still bakes fine
  • I toast a few extra oats and sprinkle them on top before baking for a slightly crunchier finish
  • I taste my milk and sweetener combo before pouring, since fruit sweetness varies a lot batch to batch
  • I double the recipe in a 9x13 dish when I'm feeding a crowd or meal-prepping for the whole week