Currently, there are two marshmallows which each give you an effect when you eat them. Pink ones give you jump boost, and green ones give you speed. However, the effects can be hard to remember if you're thinking about the potion color of each one. Speed is blue, but it comes from green? Jump boost is green, but it comes from pink?

This is why I'm suggesting a slight rework + one extra marshmallow color.

Having pink, green, and blue marshmallows would help identify what effect each one gives. Green would give Jump Boost II for 20 seconds (as pink does now), pink ones would give Regeneration II for 20 seconds, and blue ones would give Speed II for 20 seconds.

To compensate for an extra marshmallow, each one should be made slightly rarer in the loot tables. If regeneration II for 20 seconds seems a bit too good, (it heals 8 full hearts), you could make it rarer than the other two or just change the potency to I.