Lush Chocolate Coffee Layers with Buttercream - Chef Melt

Ingredients

• 2 large eggs, at room temperature
• ½ teaspoon baking soda
• 1 cup (237 ml) freshly brewed hot coffee
• ½ cup (100 g) light brown sugar
• ¾ cup (60 g) Dutch cocoa powder
• ½ cup (118 ml) milk, at room temperature
• ¾ cup (180 g) sour cream, at room temperature
• 1 teaspoon salt
• 2 teaspoons baking powder
• 1 teaspoon instant espresso powder
• ¼ cup (57 g) unsalted butter, melted
• ½ cup (118 ml) canola or vegetable oil
• 1½ cup (150 g) white sugar
• 2 cups (240 g) all-purpose flour
• 2 teaspoons (10 ml) vanilla extract
• 6 tablespoons (75 g) white sugar
• 6 tablespoons (90 ml) water
• ½ teaspoon vanilla extract
• ¼ cup (59 ml) coffee, brewed
• ¼ cup (20 g) sifted cocoa powder
• 5-6 cups (600-720 g) powdered sugar
• 20 tablespoons (283 g) unsalted butter, softened
• ¼ teaspoon salt
• 3 tablespoons (45 ml) espresso (blend 3 tablespoons instant espresso powder with 1½ tablespoons warm water)
• 2 tablespoons (30 ml) heavy cream