Baked churros bowls to stuff generously

Ingredients

• 1 cup water
• 1/2 cup butter
• 1 Tbsp brown sugar
• 2 Tbsp sugar
• 1 pinch of salt
• 1 1/3 cups flour
• 1 tsp vanilla extract
• 3 eggs
• vegetable oil
• 1/2 cup heavy cream (30% fat)
• 3 1/2 oz dark chocolate
• 1/2 cup cold heavy cream (30% fat)
• 100 g mascarpone
• 1 Tbsp powdered sugar