- Preheat Oven to 350 degrees, grease and flour three (8 inch) pans 
- In a medium size bowl whisk together the flour, baking powder and salt. Set aside 
- In another bowl combine the egg whites, champagne, vanilla, strawberry extract, and vegetable oil. Whisk until blended and set aside. 
- In the bowl of your mixer, cream the butter and sugar 3 to 5 minutes. When it is light and fluffy add approximately ⅓ of the dry ingredients and mix until blended. Then add ½ of the liquid ingredients mixing until blended. Continue alternating dry and wet ingredients. Begin and end with dry ingredients (3 additions of dry and 2 wet). *Makes 7 ½ cups of batter. 
- Pour into prepared pans and sprinkle finely chopped strawberries over the batter, trying to avoid clumping the strawberries together. Bake 25 to 30 minutes. The cake is done when a toothpick inserted the center comes out clean. Cool in baking pans 10 min. then turn out. 
- For the Champagne Simple Syrup 
- In a small saucepan add the sugar and champagne. Over medium heat, cook until the sugar dissolves, stirring constantly until the mixture is clear.  
- Remove from the heat and cool completely before using. It can be stored in the refrigerator approximately 2 weeks.  
- Use sparingly on your cake layers. Using a toothpick or skewer, make a few holes on the top of each cake layer. Remember that using too much syrup can cause the cake to become soggy. Using a pastry brush, brush the simple syrup on top of each cake layer. Now you are ready to fill and frost your cake.