01 - Combine rolled oats, almond milk, chia seeds, maple syrup, and vanilla extract in a medium bowl or mason jar. Stir thoroughly until all ingredients are well incorporated.
02 - Gently fold the mixed berries into the oat mixture, reserving a small portion for topping if desired.
03 - In a small separate bowl, whisk almond butter with 2 tablespoons almond milk until smooth and pourable consistency is achieved.
04 - Layer half the oat mixture into two jars or bowls. Drizzle with prepared almond butter mixture, then top with remaining oats.
05 - Cover containers tightly and refrigerate for at least 4 hours or overnight to allow oats and chia seeds to soften and fully absorb the liquid.
06 - In the morning, stir to combine or leave layered. Top with reserved berries, sliced almonds, and additional almond butter or sweetener if desired. Serve chilled.