The best drip cakes are created from layer cakes. Try baking a triple layer cake with three round cake pans. You can choose any flavor you want. Strawberry, vanilla, and chocolate are all great choices for a drip cake with ganache glaze. You can also use a boxed cake mix to make your cake. Once you bake the cake of your choice, let it cool completely. Make sure you let the cake cool at room temperature until it is cool to the touch. You should not feel any warmth coming from the cake. This should take about 20-30 minutes. Once the cake is cool, ice it.  You can use any type of icing, like buttercream or fondant. You can also used store-bought icing. You will need to refrigerate the cake before you can cover it in dripping ganache glaze. Place the iced cake in the refrigerator and allow it to cool for at least 60 minutes.

Summary:
Bake a layer cake. Ice the cake. Refrigerate the iced cake.