Place the frozen raspberries into a blender or food processor.
Add the Greek yogurt and honey to the raspberries.
Blend the mixture until the raspberries are broken down and the swirl appears streaked throughout, about 30 seconds. You want a slightly chunky, vibrant mixture, not completely smooth.
Use a spatula to gently fold the swirl mixture into a serving bowl if desired for presentation, or serve directly for a marbled effect.
Serve immediately for a cold, slightly icy texture, with visible raspberry streaks and a fragrant berry aroma.