How can I make a ooey gooey cake that is rich and decadent?

To make a rich and decadent ooey gooey cake, use ingredients like butter, chocolate, and sugar in generous amounts. Incorporate ingredients like cream cheese or condensed milk for extra richness. Bake the cake until it is slightly underdone to achieve a gooey texture. Top with a drizzle of caramel or chocolate sauce for added decadence.