How to Make Decadent Chocolate Mousse

Ingredients

• 2 cups granulated sugar
• 1 3/4 cups all-purpose flour
• 3/4 cup unsweetened cocoa powder
• 1 1/2 teaspoons baking powder
• 1 1/2 teaspoons baking soda
• 1 teaspoon salt
• 3 large eggs
• 1 cup milk
• 1/2 cup vegetable oil
• 2 teaspoons vanilla extract
• 1/2 cup boiling water
• 1/2 cup hot coffee
• 1/4 cup hot water
• 1/4 cup unsweetened cocoa powder
• 2 dark chocolate bars (113 g each), chopped
• 2 cups heavy whipping cream
• 6 tablespoons powdered sugar
• 1/2 teaspoon vanilla extract
• 1/2 cup dark chocolate, chopped
• 1/2 cup heavy cream