The cake is so soft and the custard just melts in your mouth.
You should give this a try too, you wont regret it!
Step 3
Once the mixture is frothy, gradually add the sugar while continuously beating until medium peaks form.

Image Credit: Savor Easy via YouTube
Pour and strain the custard mixture over the loaf pan, then pour the cake batter on top.
Super Yummy Caramel Custard Cake Recipe

