Preheat your oven to 375 F
Start with the cake
Follow the directions on the box to make the mix, not to bake it
now the flan mix, beat the eggs manually and then add the rest of the ingredients, IF YOU DON'T BEAT THE EGGS BEFORE YOU ADD THE REST OF THE INGREDIENTS IT WILL TAKE LONGER TO GET THE MIX RIGHT
Add the vanilla extract. Do not use an electric mixer because you don't want any bubbles in your flan so just mix it together with a hand wisk
Put it aside when it's done
With the sugar and water make a caramel, turn your stove on hi
BE CAREFUL DON'T BUR IT It should have a dark golden color. As soon as it gets to that golden color turn the stove off and very quickly get to the next step, because it can burn in 3 seconds.
Pour the caramel in your cake pan and grab it with a towel cuz is gonna get hot very fast. Cover the inside of the pan with the caramel as shown on the video, you don't need to grease the pan
Then add the cake mix
Add the flan mix and you will see that the flan sinks to the bottom of the pan, don't worry if it doesn't do it immediately, it will get there
Put a pot of water to a boil
Grab your tray and you are going to do a double boiler
Wrap the pan in aluminum foil very tightly on the edges, put it inside the tray and pour the boiling water, so it covers half of the cake pan, my tray is big but you can use a smaller one.
Put it in the oven and bake it for 1 hour and 30 min, then take it out of the double boiler, remove the aluminum foil and let it cool for about 1 hour.
Flip it in to a plate like you see on the video
IT's DONE!!!! You can garnish with chopped walnuts on top
If you let the caramel get a little bit brown you will get something like this, i used a different cake mold on this one