the beautiful single servings cake pan for ROSE’S heavenly CAKES: Individual Pineapple Upside-Down Cakes (page 339) is a classic and now carried by many retail stores.
but, hector’s first take is on an angel food silicone pan.
the general idea is that the width of the angel food pan (distance between sides and center tube) is the same width as the single servings cake pan. so, results should be flat even.
the silicone pan is filled only 2″ full. this usually means a 5″ dangerous fall when upside-downing the cake (when inverting the pan to unmold the cake). be nice and cut a cardboard round with a center hole, sized to fit on the baked cake. place it on the cake prior upside-downing and hold the cake thru the cardboard!
another option is to follow the 11″ take from Rose’s PBS series, but i don’t have an 11″ pan. on youtube: