Preheat oven to 325ºF.
Prepare two 8-inch or two 9-inch round cake pans by spraying them with Baker's Joy.
In a mixing bowl, combine white box mix, eggs, water and melted butter. Mix at medium speed until smooth.
Pour into cake pans, evenly. Tap pans on the counter to remove air bubbles.
Cook cake for about 22 minutes. Test for doneness using the toothpick test.
Remove cake from oven and allow to cool in pans for 10 minutes.
Remove cakes from pans by turning upside down on Parchment paper and allow to cool completely.
Cut cake layers in half, creating 4 layers.
In a mixing bowl, slice and hull each strawberry. Discard stems and hulls. Mix in the 1/2 cup of fine sugar in with strawberries. Cover with plastic wrap and chill in the refrigerator for at least 30 minutes, up to two hours.
In a mixing bowl, with an electric mixer, whip the whipping cream until stiff peaks form, about five minutes. Add the 2 Tablespoons of extra-fine sugar and vanilla flavoring until dissolved.
Place one section of cake, cut side up on a serving platter or cake taker. Spread a single layer of cut strawberries onto the cake. Spoon 3 Tablespoons of accumulated strawberry juice onto the cake. Apply a thin layer of whipped cream. Add another layer of cake, cut side down. Spread a single layer of strawberries onto the cake, followed by 2 more Tablespoons of juice and a layer of whipped cream. Repeat the next two layers, finishing with a layer of whipped cream.
After final layer of whipping cream, decorate the top of cake with leftover strawberries.
For best results, chill the cake for two hours before serving.