Mash the banana: In a medium bowl or large measuring cup, mash one ripe banana until mostly smooth with a few small chunks for texture.
Whisk the wet ingredients: Add 1 cup milk, 1/2 cup plain Greek yogurt, 2 tablespoons natural peanut butter, 1/2 teaspoon vanilla, and 1–2 teaspoons maple syrup or honey. Whisk until the peanut butter dissolves and the mixture looks uniform.
Add dry ingredients: Stir in 3 tablespoons chia seeds. If using protein powder, add 1/2 to 1 scoop now.
Whisk well so no dry pockets remain.
Season it: Add a small pinch of salt and a dash of cinnamon, if you like. Both boost flavor and make the sweetness pop.
Rest and whisk again: Let the mixture sit for 5–10 minutes, then whisk once more. This prevents clumping and ensures an even set.
Portion and chill: Divide into 2 jars or one larger container.
Cover and refrigerate at least 2 hours, ideally overnight, until thick and pudding-like.
Stir and top: In the morning, give it a quick stir. If it’s too thick, loosen with a splash of milk. Top with banana slices, peanuts, cacao nibs, or a drizzle of peanut butter.
Serve cold: Enjoy straight from the fridge for breakfast, a snack, or a protein-packed dessert.