I never heard of Royal Fudge, but it sounds delicious. I never heard of adding ginger to fudge. I make Peanut Butter Fudge from scratch using cold water to test. I used to make chocolate fudge using cocoa when I was growing up. You also had to drop some in a cup of cold water until a soft ball formed.
My chef loves fudge of about any kind. I will pass this along to her. I myself like Peanut Butter, if made sugar free, which it can. Thanks again @donna!