Take about 1/3 of the whipped cream and fold it into the chocolate-yolk mixture. This step is important because the chocolate base is dense and heavy so mixing in a small amount of whipped cream first lightens it, making it easier to gently incorporate the rest of your airy ingredients without deflating them. Don’t worry if you lose some volume here; it’s expected.
Add Remaining Whipped Cream:
Gently fold in the rest of the whipped cream until just combined.
Now that the base is lighter, you can fold in the remaining cream more gently, preserving its airiness.