1. Preheat Oven:
   • Preheat your oven to 350°F (175°C). Grease and flour two 9-inch round cake pans.
2. Prepare Cake Batter:
   • In a large bowl, whisk together flour, sugar, cocoa powder, baking powder, baking soda, and salt.
   • Add eggs, milk, oil, and vanilla extract. Mix until well combined.
   • Stir in the boiling water, mixing until the batter is smooth.
   • Pour the batter evenly into the prepared cake pans.
3. Bake:
   • Bake in the preheated oven for 30-35 minutes or until a toothpick inserted into the center comes out clean.
   • Allow the cakes to cool in the pans for 10 minutes before transferring them to a wire rack to cool completely.
4. Prepare Mocha Buttercream:
   • In a large bowl, beat the softened butter until creamy.
   • Add powdered sugar, cocoa powder, dissolved coffee, vanilla extract, and a pinch of salt.
   • Beat until smooth and fluffy.
5. Assemble:
   • Once the cakes are completely cooled, spread a layer of Mocha Buttercream on top of one cake layer.
   • Place the second cake layer on top and frost the entire cake with the remaining Mocha Buttercream.
6. Serve and Enjoy:
   • Slice and serve your delicious One-Bowl Chocolate Cake with Mocha Buttercream.

This easy-to-make cake delivers a rich chocolate flavor complemented by the delightful mocha buttercream. Enjoy your decadent treat! 🍰✨