We've made this several times without any modifications to the directions. It's a great go-to recipe when we need to bring a cake somewhere on super short notice. We use a gluten-free chocolate cake mix and it's always worked great.
This is excellent. I added a little more cayenne because we like it spicy. I added a little margarine to the glaze and milk, no water, then drizzled each slice after it was cut. I can then plastic wrap the cake and keep the glaze for additional servings. This is quick, easy and just as I remember eating in Mexico. Thanks for posting!