Malva Pudding, South African Baked Dessert

INGREDIENTS

• 6 1/2 ounces sugar (3/4 cup, 200 ml, or 180 g)
• 2 large eggs
• 1 tablespoon apricot jam
• 5 ounces all-purpose flour (150 g)
• 1 teaspoon baking soda
• 1/2 teaspoon salt
• 1 tablespoon butter (a generous tablespoon)
• 1 teaspoon vinegar
• 1/3 cup milk
• 3/4 cup fresh cream (200 ml)
• 3 1/2 ounces butter (100 g)
• 3 -5 ounces sugar (90 - 150 g)
• 1/3 cup hot water (90 ml)
• 2 teaspoons vanilla essence