Another really easy, low sugar cake is:
1 One step angel food cake mix (1 bag only)
1 20 oz can crushed pineapple unsweetened
Put the cake mix in a large mixing bowl and add the pineapple juice and all and stir thoroughly. If the pineapple has hardly any juice add about 1/4 cup water. The mixture will foam. Immediately pour it into a ungreased 9 x 13 metal pan and bake at 350 until lightly browned and firm in the middle. Check at about 25 to 30 minutes baking time. You can either leave it in the pan or cut around the edge and turn out. It's good with whipped topping. When I use Aldi's crushed pineapple , sometimes there is very little juice compared to other brands. I've never had to add water any other brand.