Hi Sherry! Here is a corrected version of your story.
If you find some incorrect grammar or other mistakes, please tell me. Thank you!
There are many interesting events that have occurred in my life, and some of them not only had a profound impression on me but also taught me a lesson. Today I want to tell you a funny story about cooking that recently happened to me. One day last month, my mother invited some (of her/my) best girl friends to dinner at my house to celebrate her promotion. She prepared to cook lots of dishes and told me, a green hand in cooking, to help her. But when I made dapanji, a particularly spicy dish of Chinese cuisine, I confused salt and sugar. So on that night, we ate a sweet and spicy dinner. I think most beginners in cooking would make the same mistake as me, since salt and sugar look similar. So I suppose it is a funny story that happened to me.
Keep in mind that in some sentences I shortened what you were saying, but still kept the meaning. This is not a word-for-word correction, and you still made your point clear in your post. Hope this helps!