Pear and juniper berry cake

Ingredients

• Cake
• 375 grams walnuts
• 6 eggs
• 585 grams caster sugar
• 2 teaspoons vanilla extract
• 1 cup (250ml) buttermilk
• 250 grams butter (melted)
• 2 and 2/3 cups self-raising flour
• Juniper berry poached pears
• 3 cups (750ml) dry white wine
• 3 cups (750ml) water
• 2 cups (440g) caster sugar
• 2 medium (50g) beetroots
• 2 tablespoons crushed juniper berries
• 1 tablespoon black peppercorns
• 3 fresh bay leaves
• 2 small corella pears (200g) peeled
• 5 medium beurre bosc pears (1.15kg), peeled
• Treacle buttercream
• 350 grams butter (chopped, softened)
• 250 grams cream cheese (chopped, softened)
• 1 1/2 cups (240g) pure icing sugar
• 2 tablespoons treacle