Pound Cake Recipe – 452g or 2 cups unsalted butter cold is fine – 540g or 2 ½ cups fine granulated sugar – 1 ½ teaspoons fine sea salt – 2 teaspoons pure vanilla extract – 6 large egg – 360g or 1 ½ cups lowfat yogurt – 480g or 4 cups cake flour sifted – 4 teaspoons baking powder Flavoring – Red = 2 tablespoons raspberry powder – Yellow = zest of 1 lemon plus ½ tsp lemon extract – Green = zest of two limes plus ½ tsp lemon extract – Blue = 2 tablespoons blueberry powder – Purple = 1 tablespoon each raspberry and blueberry powder – food gel coloring for each layer Glaze – Zest and Juice of 1 orange – 1 ½ cups powdered sugar – Splash of pure vanilla extract