Keep the ingredients ready(chop celery very fine,even onion).
Keep a pan add butter with garlic and saute till transparent.
Then add celery and saute nicely.
Now add onions till translucent.
Add maida and stir well for a minute add milk,stir in nicely without any lumps.
Now add sugar and salt as per taste.
Let it boil for 5 minutes.
You can adjust the consistency by adding water or even milk at this stage.
Add pepper powder and cream stir once and switch off.
Serve hot.
Notes
You can adjust the seasoning while serving.
If you don't have cream just skip that part.
Even white pepper powder can be used.
Celery should be finely chopped for this soup.
You can adjust the consistency according to your need.