In a large mixing bowl, combine Greek yogurt, milk, cream cheese, honey (or maple syrup), and whisk until smooth.

Add rolled oats and chia seeds to the creamy base, stirring gently until coated.

Fold in mixed berries gently to distribute evenly.

Layer half of the oat mixture into jars, followed by a layer of mixed berries.

Top jars with the remaining oat mixture to cover the berries completely.

Seal jars and refrigerate overnight or for at least 4 hours.

Remove from fridge, stir gently, and garnish with extra berries before serving.