While you probably could simply bake this exact recipe in an 8x8-inch pan and make a cake out of it, I haven't tested the recipe that way. However, I do have the most amazing tried and true recipe for The Best Tres Leches Cake which you can make in a 9x13-inch pan. It's a different cake base than this one. It doesn't use any butter and it uses all white sugar and no brown sugar.  It is truly a winning tres leches cake recipe so just make that recipe if you want to make a tres leches cake!