Preheat oven to 350 degrees and spray (3) 9 inch cake pans with nonstick baking spray.
In a small bowl, whisk espresso and warm water until combined.
In a large bowl, whisk flour, sugar, cocoa powder, baking soda, baking powder, and salt. Stir in eggs, sour cream, buttermilk, espresso mixture, oil, and vanilla until just combined.
Evenly divide batter between 3 pans.
Bake for 25-30 minutes or until a tooth pick inserted near the center comes out with just a few moist crumbs. Cool completely.
For the Frosting
In a large bowl or standing mixer bowl, cream butter, vanilla, powdered sugar, strawberries, and salt.
Gradually add powdered sugar a little at a time adding heavy cream as needed to reach your desired consistency.
Assembly
Trim cake layers using a cake leveler and place the first layer onto a 10 inch cake board.
Spread first layer with around 1 cup of frosting. Repeat.
Frost the final layer spreading frosting down the sides and piping on top if desired.
For the Ganache
In a large microwave safe measuring cup, heat cream until steaming. Pour into bowl of chocolate chips. Allow to sit for around 1 minute and then whisk smooth.
Pour into squeeze bottle and drip down sides of cake.