Preheat oven to 350°F. Grease and flour 3 8” round cake pans, then line bottom with roundparchment paper. Set aside.
Cream the butter and sugars in a large mixingbowl. Add in the eggs and vanilla and mix until well blended.
In a separate large mixing bowl, combine flour,baking soda, baking powder, and salt.
Mix the cocoa powder and boiling water in amedium bowl until well combined and no lumps remain.
Alternating between the two, slowly add dryingredients and chocolate mixture to the bowl with the butter and sugar. Mix onlow speed to incorporate ingredients.
Divide the cake batter evenly between the threecake pans and place in the pre-heated oven. Bake 22-28 minutes, or untiltoothpick inserted in the center of the cake comes out clean.
Remove from oven and set aside to cool forapproximately 10 minutes before transferring the cakes from the pans to a wirerack to cool completely, approximately 10-15 more minutes. (Cakes should nolonger be warm to the touch before frosting).
Toassemble the cake, place the first layer top-side down on a cake plate. Add 1/3of the frosting to the top of the cake layer and spread it out evenly. Take thesecond layer and level off the rounded top with a knife or cake leveler. Placethe second layer on top of the first layer, top-side down. Add frosting to thislayer and spread out evenly. Repeat this with the 3rd layer, andspread the remaining frosting out on the top layer. Slice and serveimmediately. Enjoy!