• Preheat the oven to 325 degrees and grease and flour a tube pan
• In a separate bowl add the flour, baking powder and the zest of 1 lemon and 1 lime. Whisk to blend and set aside.
• In the bowl of your mixer, mix the butter until smooth, gradually add the sugar and mix until lightened in color and fluffy, 3 to 5 minutes.
• Add the eggs one at a time, mixing after each egg until the yellow of the yolk has blended in.
• Add the vanilla and lemon extract.
• Alternately add the 7-UP and the dry ingredients to the butter, sugar, egg mixture.  Begin and end with the dry ingredients  (3 additions of dry and 2 additions of 7-up).
• Bake at 325 degrees for 1 hour and 10 minutes or until a wooden skewer or toothpick comes out clean or with just a few crumbs attached.
• Allow to cool in the pan for about 10 minutes before turning out.

For the Glaze

• Add 2 cups powdered sugar, sifted to a mixing bowl.   
• Add  2 Tablespoons lemon juice and 1 Tablespoon lime juice.  Mix with a spoon until blended and smooth. 
• Add additional lemon juice to thin out the glaze or more powdered sugar to thicken it.  You will have approximately 1 cup of glaze.