Preheat the oven to 375°F. Lightly grease a metal 8" round cake pan; cut a piece of parchment to fit, grease it, and lay it in the bottom of the pan.
Loosen the edges of the pan with a table knife and turn it out onto a serving plate. The top will now be on the bottom; that's fine. Also, the edges may crumble a bit, which is also fine. Allow the cake to cool completely. Sprinkle with powdered sugar and then glaze.
Using a spoon, drizzle glaze over the cooled cake.