We are all heart here
First I used a simple mix of sugar, flour, eggs, and 0% Stonyfield Milk. Many do use 2& or whole milk for a thicker texture, but I choose to go healthy. Pick whatever suits you best.
Then comes the flooding. I use an outline method where I draw a single line around the edges and then fill in the middle.
Now for fine detailing. I tend to draw free-hand as when I look at an image and try to do the same, it never turns out right.