To prepare a strawberry lemonade cake with fresh strawberry buttercream frosting recipe, first you need to prepare the cake batter. First, you'll need 2 cups of cake flour, 1 cup of sugar, and 1 teaspoon of baking powder. Then, add 2 tablespoons of butter to the dry ingredients and mix until the butter is completely melted. Next, pour the batter into the greased and floured cake pan and bake for 35 to 40 minutes, or until toothpick inserted in the center comes out clean. Remove the cakes from the oven and allow them to cool completely before frosting.