Magnifica ESAM4200Common issuesThe frothed milk contains large bubbles
Magnifica ESAM4200

The frothed milk contains large bubbles

Try this solution

Use skimmed or semi-skimmed milk at refrigerator temperature (about 5°C)

Possible cause:
The milk is not cold enough or is not semi-skimmed.

If the result is not as you wished, try changing brand of milk.