Preheat oven to 375 degrees
Prepare a 9’ springform round baking pan.
Line the baking pan with a parchment paper cut to fit.
In a medium-sized bowl add the cake flour, and sugar, baking soda, and salt whisk to combine.
Add the egg, sour cream, and vanilla extract to the flour and mix to combine.
In a medium saucepan, over medium add the butter and water.
Stir to combine until fully melted and hot.
Slowly begin to add the butter mixture to the flour mixture and mix to combine.
NOTE: The batter will be VERY thin.
Pour the batter into the prepared springform pan.
Bake for 20-24 minutes until it's fully baked.
Cool completely
Top your cake with lemon curd and spread evenly
Garnish with whip cream
ENJOY!