Cake:1 and 1/2 cups of flour3/4 cup of brown sugar1 cup of margarine2 tablespoons of honey3 eggs1 teaspoon of baking powder1 pinch of salt1 natural yogurt (about 125 grams)1 teaspoon of vanilla extract¾ cup of walnutsTopping:1 tablespoon of honey1/4 cup of water