Place the banana, Greek yogurt, and milk into your blender and blend on medium speed for about 30 seconds until the mixture is smooth and creamy, with a slightly frothy texture.
Add the frozen berries to the blender and blend again for about 20 seconds, aiming for a thick, vibrant mixture. If it feels too thick, add a splash more milk and blend briefly to loosen it up.
Swirl in the fruit jam and peanut butter by spoonfuls, then pulse a few times just to create a marbled effect—avoid fully blending to keep the beautiful swirl appearance.
Check the consistency; it should be thick enough to hold a spoon upright but still scoopable. If it's too stiff, add a tiny splash of milk and blend briefly.
Taste the mixture and, if desired, drizzle a little honey or maple syrup for extra sweetness, then give it a quick blend to incorporate.
Spoon the thick, marbled mixture into a bowl and use the back of your spoon to smooth the surface, creating gentle swirls or peaks for visual appeal.
Garnish with fresh berries, a dollop of jam, or granola if desired, then serve immediately for the freshest, most colorful presentation.
Enjoy your vibrant peanut butter & jelly smoothie bowl with a spoon, savoring the creamy, fruity, and nostalgic flavors in every bite.