This layer cake is a showstopper dessert that is perfect for any special occasion. To make this cake, start by creaming together butter and sugar until light and fluffy. Add in eggs, one at a time, then mix in vanilla extract. In a separate bowl, mix together flour, baking powder, and salt. Add the dry ingredients to the wet mixture, alternating with milk. Fold in chopped strawberries and rhubarb, then pour the batter into three greased cake pans. Bake until golden brown, then layer the cakes with whipped cream and sliced strawberries. Enjoy!