Cut through the top layer only with a knife to swirl strawberry sauce. Step 7. Bake in the preheated oven until the center is almost set, 45 to 50 minutes. Step 8. Cool on a wire rack for 10 minutes. Carefully run a knife around the edge of the pan to loosen; cool for 1 hour at room temperature.. Instructions. Preheat oven to 350 degrees. In a small bowl, whisk together eggs, milk, and vanilla. In a standing mixer, stir together flour, sugar, baking powder, and salt. Beat the butter into the flour mixture, one cube at a time. Continue to beat until it resembles coarse crumbs.