It depends on what type of post you want to write, sharing of operations or simple life sharing. If it is about operation, you need to be more detailed, write down the raw materials, ingredients, steps and other details, and then talk about some small experience.
If it is just about sharing life, taking pictures is very important. Take beautiful pictures of the finished cake, and then share some trivial things in life or some interesting things during the making.
Of course, no matter which one you choose, you must have your own true feelings!