How about carrot cake? That's tasty and healthy.
First recipe I found online for carrot cake.
4 eggs < Healthy.
1 1/4 cups vegetable oil < Not healthy, replace with butter.
2 cups white sugar < Neutral. Empty calories but no real negatives.
2 teaspoons vanilla extract < Fine.
2 cups all-purpose flour < Not healthy.
2 teaspoons baking soda < Fine.
2 teaspoons baking powder < Fine.
1/2 teaspoon salt < Fine.
2 teaspoons ground cinnamon < Fine.
3 cups grated carrots < That's a lot of carrots, but also fine.
1 cup chopped pecans < Never cook nuts. Ever. It's like making varnish.
I'd have to do a fair bit of supplementing. Experimenting with other flours and / or starches would take time. Just because the name has something veggie / fruit like in it, doesn't make it healthy.