Ooey Gooey Butter Cake is decadent, rich, and buttery! It is hard to believe that it is made with a yellow cake mix. O ...

Grease 4 x 20cm/8in ultra-shallow layer cake tins and line them with baking paper. Don’t use loose-bottomed tins as this is a runny batter. Cut the butter lengthways into four pieces (just to ...