Here are a few cleaner, more respectful and engaging rewrites of your caption:
Polished version:
Black people pound cake—don’t lose this recipe! A rich, classic dessert that’s always a favorite.
Smoother viral style:
This pound cake recipe is a keeper—rich, moist, and unforgettable. Don’t lose this one!
Short hook style:
The pound cake recipe you don’t want to lose—soft, rich, and absolutely delicious.
If you want, I can also turn it into a full recipe post or modernize it while keeping the traditional feel.