Make the caramel layer (optional but delicious): Stir together date caramel or caramel sauce with a pinch of sea salt. Taste and adjust sweetness.
Set aside.
Mix the base: In a medium bowl or jar, whisk milk, yogurt, protein powder, vanilla, and maple syrup or honey (if using) until smooth. No dry clumps should remain.
Add the dry ingredients: Stir in oats, chia seeds, and a small pinch of sea salt. If you want a richer bowl, swirl in nut butter now.
Layer it up: Spoon half the oat mixture into a jar, add a dollop of the caramel, then top with the rest of the oats.
Finish with another small drizzle of caramel if you like.
Chill: Cover and refrigerate for at least 4 hours, preferably overnight. The oats and chia will absorb the liquid and thicken.
Finish and serve: In the morning, stir for extra creaminess. If it’s too thick, add a splash of milk.
Top with flaky salt, chocolate chips, chopped nuts, or banana slices.