From "The Farm Vegetarian Cookbook" (makes a nice, moist cake)
Gingerbread:
Makes one 8 x 8 "pan
1 cup molasses (I've always used blackstrap molasses)
1/2 cup melted margarine or oil
2 tsp ginger
2 c. flour (I'd use barley flour, a whole-grain flour that's a nice sub for white flour)
1 tsp salt
1 tsp baking soda in 1 cup hot water (a touch of apple cider vinegar helps it react more)
Beat together the molasses and margarine/oil, then beatin the flour, ginger and salt. Beat in the soda water 1/2 cup at a time until mixture is smooth. Bake at 350 degrees for 35-40 minutes. (It's important to the get mix into the oven ASAP after mixing the soda water in).
I used to make this quite often, and have tweaked it to make other kinds of cakes and cupcakes (using a different type of sweetener and using lemon flavoring instead of ginger to make a lemon cake, for example).