Simple Chocolate Birthday Cake

Ingredients

• Cake For 2 Layers
• 1 1/2 cups all-purpose flour
• 1 1/2 cups granulated sugar
• 1 cup unsweetened cocoa powder
• 1 1/2 teaspoons baking soda
• 1 1/2 teaspoons baking powder
• 1 teaspoon salt
• 2 eggs, at room temperature*
• 3/4 cup buttermilk
• 1/4 cup plain greek yogurt
• 1/2 cup canola oil
• 1 tablespoon vanilla extract
• 3/4 cup strong brewed coffee, hot
• 1/2 cup semi-sweet chocolate chips (optional)
• Whipped Chocolate Buttercream For 2 Layers
• 3 (1 1/2 cups) sticks salted butter, softened to room temperature
• 3 cups powdered sugar
• 3/4 cup unsweetened cocoa powder
• 2 teaspoons vanilla extract
• 3-4 tablespoons heavy whipping cream