Indulge in Decadence: Coffee Liqueur Brownies

Ingredients

• 1 cup (225 g) unsalted butter
• 2 cups (400 g) granulated sugar
• 4 large eggs
• 1 teaspoon vanilla extract
• 1 cup (125 g) all-purpose flour
• ¾ cup (75 g) unsweetened cocoa powder
• ½ teaspoon salt
• ½ cup (120 ml) coffee liqueur (e.g., Kahlúa)
• 1 ½ cups (360 ml) heavy cream
• ½ cup (60 g) powdered sugar
• ⅓ cup (80 ml) coffee liqueur
• 2 tablespoons (30 g) gelatin powder, dissolved in ¼ cup (60 ml) warm water
• 1 cup (240 ml) strong brewed coffee, cooled
• ½ cup (120 ml) coffee liqueur
• 3 large eggs, separated
• ½ cup (100 g) granulated sugar
• 8 oz (225 g) mascarpone cheese
• 12 ladyfinger cookies
• Unsweetened cocoa powder, for dusting