To prepare a yellow cake mix cookies cake recipe, first you need to prepare the cake batter. First, you will need the following ingredients: 12 cup flour, 1 teaspoon baking powder, 2 tablespoons butter, 1/2 cup sugar, and 1 tablespoon vanilla extract. Mix the dry ingredients together with the wet ingredients until they are well combined. Pour the batter into the prepared cake pan and bake for 20 minutes at 325 degrees F. The cake will be done when the toothpick inserted in the center comes out clean.