Chocolate Yule Log - Miz En Place

Ingredients

• 1-2/3 cups powdered sugar
• 1/2 cup unsalted butter (at room temperature)
• 2 tbsp coffee-flavored liqueur
• 1-1/2 tbsp unsweetened cocoa powder
• 1 pinch salt
• 1/3 cup mascarpone cheese
• 2 tbsp melted butter
• 1/2 cup unsweetened cocoa powder
• 2 tbsp all-purpose flour
• 1/2 tsp kosher salt
• 5 eggs (at room temperature)
• 2/3 cup granulated sugar
• 1/2 tsp vanilla
• 2 tbsp powdered sugar (or as needed)
• 1 cup heavy cream (boiling-hot)
• 8 oz dark chocolate chips