To prepare Auntie Lin's Killer Strawberry Shortcake recipe, first you need to prepare the cake batter. First, you'll need the following ingredients: 1 cup fresh strawberries, 2 tablespoons sugar, 1 teaspoon vanilla, and 1 tablespoon butter. In a medium mixing bowl, mix together the flour, baking powder, sugar and salt. Add the wet ingredients to the dry ingredients and mix until just combined. Pour the batter into the prepared cake pan and bake in the preheated oven for 35 to 40 minutes, or until the toothpick comes out clean. Allow to cool before cutting into squares.