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Healthy 5-Day Overnight Oat Jars with Chia Seeds and Mixed Berries

healthy overnight oat jars - featured image

A nutritious and convenient no-cook breakfast recipe featuring rolled oats, chia seeds, and mixed berries layered in jars for a fresh and tasty start to your day. Perfect for busy mornings and meal prep.

Ingredients

Scale
  • 2 ½ cups (about 225g) rolled oats
  • 5 tablespoons chia seeds
  • 3 cups (720ml) unsweetened almond milk
  • 1 cup (240g) plain Greek yogurt, full-fat or low-fat (optional)
  • 3 tablespoons honey or maple syrup
  • 1 teaspoon vanilla extract
  • 3 cups (about 450g) mixed berries (blueberries, raspberries, strawberries), fresh or frozen
  • 1 teaspoon lemon zest (optional)
  • Pinch of salt

Instructions

  1. In a large mixing bowl, whisk together rolled oats, chia seeds, and a pinch of salt to evenly distribute the chia seeds and prevent clumping.
  2. In a separate bowl, stir together unsweetened almond milk, Greek yogurt, honey or maple syrup, and vanilla extract until smooth.
  3. Pour the wet mixture over the dry ingredients and stir gently but thoroughly until oats and chia seeds are fully moistened. The mixture should be thick but pourable.
  4. Gently fold in 2 cups (300g) of mixed berries and lemon zest, reserving 1 cup (150g) of berries for topping.
  5. Spoon the mixture evenly into five 5-ounce (150ml) jars or airtight containers, leaving room at the top.
  6. Top each jar with a tablespoon of the reserved mixed berries.
  7. Seal the jars with lids and refrigerate overnight (at least 6 hours) to allow chia seeds to swell and thicken the mixture.
  8. In the morning, stir each jar gently before eating. Add a splash of almond milk if the oats are too thick. Enjoy cold or let sit at room temperature for 10 minutes if preferred.

Notes

Use rolled oats for best texture; instant oats get mushy and steel-cut oats don’t soften enough. Mix chia seeds well to avoid clumps. Fold berries gently to keep them intact. Store jars airtight in the fridge up to 5 days. Add nut butters or swap ingredients for dietary needs. Avoid freezing as texture changes. Stir oats once or twice after a couple of hours to prevent settling.

Nutrition

Keywords: overnight oats, chia seeds, mixed berries, healthy breakfast, meal prep, no-cook breakfast, easy breakfast, gluten-free, dairy-free option