cake flour - watch the video to see (watch the video to see)
sugar - watch the video to see (watch the video to see)
baking powder - watch the video to see (watch the video to see)
salt - watch the video to see (watch the video to see)
unsalted butter - watch the video to see (at room temperature, watch the video to see)
eggs - watch the video to see (watch the video to see)
vanilla extract - watch the video to see (watch the video to see)
milk - watch the video to see (watch the video to see)
lemon curd - watch the video to see (for filling, watch the video to see)
frosting - watch the video to see (for decoration, various colors for the rainbow effect, watch the video to see)
food coloring - watch the video to see (various colors for the rainbow effect, watch the video to see)