Driving me Gingernuts

Where did I go wrong with my gingernuts? Today i tried my hand at the Jean's gingernuts recipe from the 1977 cakebook. They got burned. Then I tried again this time using the on line recipe where the temperature was set much lower r than the 190 c. from the book. And I didnot use the fan but stuck to the conventional oven function. Again getting burned biscuits in less than 10 minutes. Finally for my last try when I used the notes I had made in the book years ago.: 15 minutes at 150 C. They look exactly like the pictute but don't snap.