Use old-fashioned rolled oats for best texture. Soak at least 4 hours or overnight. Peanut butter thickens as it chills, so stir well before serving and add 1–2 tablespoons milk if too thick. For a thicker texture without chia seeds, slightly reduce milk or add 1 tablespoon Greek yogurt. Store in airtight jars up to 4 days. Freezing is not recommended as it may affect texture.