These brownies are good any time of the year but the vivid red makes it particularly fitting for valentines day, this recipe is from sallys baking addiction and she adapted it from a Sunny Anderson recipe. I prefer the sally's baking addiction recipe because using just the egg yolk makes the cheesecake layer thicker (which I love) but if you'd rather not have an egg white hanging around feel free to use the whole egg in the cheesecake layer.
Whenever I make anything red velvet (brownies, cakes, cookies, cheesecake etc) I use red gel food colouring instead of liquid colour as the liquid red food colouring sold in UK supermarkets never gives you the bright red you want. The brand I use the most is Home2bake professional icing colour which you can buy from Asda. You only get basic colours like green, yellow, blue so if you need any fancy tints and shades like paprika, primrose, ice blue and so on you will need to go to a sugarcraft store or buy online.
Now back to these brownies, after