I would put vanilla pudding powder in whip before whipping it up.
Milky whip or parve is both good.
I use half a box (I think 44grams) for the small tenuvah or riches whip. I think they are between 200-250 ml
Mix cornstarch, sugar, salt and milk. Add whisked eggs and place on low medium flame. Whisk constantly until thickened. Remove from hear and stir in vanilla extract.
Remains fresh in fridge for 2 days. Or freeze in donut size portions and defrost at room temperature.