Ruins of a count's castle

Ingredients

• 100 grams (3.5 ounces) flour
• 6 grams (0.21 ounces) baking powder
• 130 grams (4.6 ounces) sugar
• 15 grams (0.53 ounces) cocoa
• 4 large eggs
• 35 grams (1.2 ounces) vegetable oil
• 1 teaspoon (5 milliliters) milk
• pinch of salt
• 110 grams (3.9 ounces) egg whites
• 300 grams (10.6 ounces) sugar
• 70 grams (2.5 ounces) water
• 15 grams (0.53 ounces) baking powder
• 300 grams (10.6 ounces) butter
• 340 grams (12 ounces) caramel spread
• 170 grams (6 ounces) sweetened condensed milk
• 25 grams (0.88 ounces) cocoa
• 0.25 teaspoon (1.25 milliliters) vanilla paste
• 170 grams (6 ounces) walnuts
• 3 tablespoons (45 milliliters) Bailey's Irish cream liquor or coffee syrup