Prep the apple: Core and dice 1 medium apple into small cubes. If you like extra texture, leave the peel on.
Toss with a squeeze of lemon juice if you’re prepping several jars.
Mix the base: In a jar or bowl, combine 1/2 cup rolled oats, 1/2 cup milk, and 1/4 cup yogurt. Stir well so the oats are fully moistened.
Add flavor: Stir in 1/2 to 1 teaspoon ground cinnamon, a tiny pinch of salt, 1 to 2 teaspoons maple syrup or honey (if using), and 1/4 teaspoon vanilla extract. Taste and adjust sweetness now—flavors mellow overnight.
Boost texture: Add 1 teaspoon chia seeds for a thicker, pudding-like consistency.
If you skip chia, use a bit less milk or slightly more yogurt.
Fold in the apple: Mix in half of the diced apple. Reserve the rest to add fresh in the morning for crunch.
Optional add-ins: Stir in a tablespoon of chopped nuts or a tablespoon of raisins/dried cranberries. A pinch of nutmeg or allspice adds cozy depth.
Chill: Cover and refrigerate for at least 4 hours, ideally overnight.
The oats soften and the flavors blend as they rest.
Finish and serve: In the morning, stir, add a splash of milk if it’s too thick, and top with the remaining apple and more cinnamon. Add nuts for crunch and a drizzle of maple syrup if you prefer it sweeter.