Mocha Layer Cake With Chocolate-Rum Cream Filling

Ingredients

• 1.5 tsps baking soda
• 83.33 g cake flour
• 0.25 tsps cream of tartar
• 2 Tbsps dark rum
• 3 large eggs
• 0.75 tsps coffee powder
• 240 ml dark rum
• 1 pinch salt
• 566.99 g semisweet chocolate separately
• 150 g semisweet chocolate
• 1 Tbsp sugar
• 1 Tbsp unsalted butter
• 1 Tbsp unsweetened cocoa powder
• 1 tsp vanilla extract
• 59.15 ml water
• 4 cups whipping cream