Olive oil & yoghurt cake with a cinnamon walnut filling - Zorbabook - Authentic experiences in Greec

Ingredients

• 1/2 cup coarsely chopped walnuts
• 2 tablespoons vanilla sugar
• 1 tsp cinnamon
• 1 tsp clove
• 1/2 cup of butter at room temperature
• 1/2 cup of olive oil
• 1.5 cup white sugar
• 4 eggs
• 1 tbsp vanilla sugar
• 3 cups plain flour
• 3 teaspoons baking powder
• 1/2 teaspoon of soda
• 1 cup Greek yoghurt