How To Make a Classic Birthday Cake Recipe from Scratch. Looking for ideas for upcoming birthdays for girls, boys, kids, teens, men, and women? Look no further than this EASY and simple step by step recipe for homemade yellow cake and fluffy chocolate buttercream frosting. Moist and delicious! You'll need vanilla, butter, sugar, eggs, flour, milk, ovaltine, powdered sugar, bittersweet chocolate.