In a bowl of electric mixer, stir together all the dry ingredients. Set aside.

Combine eggs, buttermilk, water or coffee, oil and vanilla in a measuring cup and lightly beat with a fork.

Add wet ingredients to the dry ingredients, and mix on medium speed for two minutes. Batter will be thin. Scrape sides and mix for another 30 seconds. Divide batter evenly among prepared pans (I like to use a kitchen scale to ensure the batter is evenly distributed - should be about 16 ounces of batter in each 8-inch pan or 12 ounces for each 6-inch).

When cakes are completely cooled, I like to wrap each cake layer individually with plastic wrap and stick it in the refrigerator or freezer until I’m ready to frost. The cake will be easier to work with if it’s cooled a bit. If I’m making the cake a day or two before I actually need to frost it, I put it in the freezer to ensure freshness. If I’m frosting same-day, I’ll just put it in the refrigerator to chill until needed.

To make the chocolate ganache, pour 1/2 cup of the heavy cream over the chocolate chips in a microwave safe bowl. Microwave for one minute and then stir until the mixture is smooth and silky. Will be a bit thick. Let cool to room temperature but not to the point that it sets.

In a small bowl, place the cold water and sprinkle with the gelatin. Let sit for at least 10 minutes. In a small saucepan, bring 1/3 cup heavy cream to a simmer and then stir in the gelatin mixture until it's dissolved. Refrigerate, stirring frequently, until cool but not set, about 5-7 minutes.

In a chilled stainless steel bowl with a chilled whisk attachment, beat the remaining whipping cream, powdered sugar, vanilla and salt until it thickens and soft peaks begin to form, about one minute. Very slowly and gradually add the gelatin mixture and continue beating until medium-firm peaks form. 

Gradually fold in the cooled chocolate ganache. 

Keep covered and chilled until ready to use.

In a bowl fitted with a paddle attachment, beat the butter on medium high until light and fluffy.

In a microwave safe bowl or over the stove, heat the cream and the chocolate. Stir to create a smooth ganache. Set aside to cool slightly.

With the mixer on medium speed, gradually stream in the chocolate ganache. Scrape the sides of the bowl and mix again.

With the mixer on low speed, gradually add the powdered sugar. Beat on low speed for 1 minute.

Add vanilla and salt and beat until combined.

Increase speed to med-high and beat for another 2-3 minutes, until light and fluffy.

Frost cake right away, or, if you cover and use later, make sure to mix with a wooden spoon right before applying to the cake to get rid of air bubbles.

In a microwave safe bowl, heat the cream.

Pour the cream over the chocolate chips and stir the chocolate chips until they melt and they cream and chocolate is well-blended.

Place the first cake layer on a cake board and spread about a cup of the whipped filling on top. Repeat with the second cake layer.

Apply a thin layer of the chocolate frosting around the entire cake to lock in the crumbs. Place the cake in the freezer for 10 minutes to chill and set the crumb coat.

Continue to frost the cake once the crumb coat is set.

Use the chocolate drip on the cake once it's completely frosted.