Place the frozen berries, ripe banana, peanut butter, jam, and milk into your blender.
Blend on high for about 30 seconds, stopping to scrape down the sides if needed, until the mixture is thick, smooth, and scoopable with a vibrant color.
Check the consistency; if it’s too thick, add a splash more milk and blend briefly to loosen it up, making it creamy but still thick enough to hold its shape.
Spoon the thick, bright mixture into bowls, smoothing the tops with the back of a spatula for an even surface.
Top the smoothie bowls with your favorite crunchy toppings—granola, sliced fruit, or a drizzle of honey—to add texture and visual appeal.
Serve immediately with a spoon, savoring the thick, creamy texture and the nostalgic flavors of peanut butter and jelly.