i have some problem with chocolate mousse?

Rose k Asked: i have some problem with chocolate mousse?

Yesterday i made a chocolate mousse for me and my boyfriend, and we really liked it. the taste was incredible and rich. However, the texture was not really the same as the one you buy. it's not fluffy and lacked somewhat moisture.it was denser and a bit drier. these are the ingredients that i used:

3.5 oz dark chocolate bar
1 tablespoons butter
1/4 cup water, divided (2 tbsp for chocolate, 2 tbsp for egg mixture)
1 tablespoon white granulated sugar
2 large egg yolks
very tiny pinch of salt
1/2 cup plus 1 tbsp heavy whipping cream (i used the regular whipping cream)

what do I need to add to make this recipe fluffier and lighter? would adding more butter and whipping cream solve the problem? and what's the difference between whipping cream and egg whites in making chocolate mousse.

please don't give me links or new recipes with new ingredients. I need to know how to adjust THIS recipe.

thank you.